How to get current CPU and RAM usage in Python

Question

What s your preferred way of getting current system status  current CPU  RAM  free disk space  etc   in Python  Bonus points for  nix and Windows platforms   There seems to be a few possible ways of extracting that from my search    Using a library such as PSI  that currently seems not actively developed and not supported on multiple platform  or something like pystatgrab  again no activity since 2007 it seems and no support for Windows   Using platform specific code such as using a os popen  ps   or similar for the  nix systems and MEMORYSTATUS in ctypes windll kernel32  see this recipe on ActiveState  for the Windows platform  One could put a Python class together with all those code snippets    It s not that those methods are bad but is there already a well-supported  multi-platform way of doing the same thing

User · Answer

I feel like these answers were written for Python 2  and in any case nobody s made mention of the standard resource package that s available for Python 3  It provides commands for obtaining the resource limits of a given process  the calling Python process by default   This isn t the same as getting the current usage of resources by the system as a whole  but it could solve some of the same problems like e g   I want to make sure I only use X much RAM with this script

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Here s something I put together a while ago  it s windows only but may help you get part of what you need done   Derived from   for sys available mem  http   msdn2 microsoft com en-us library aa455130 aspx   individual process information and python script examples  http   www microsoft com technet scriptcenter scripts default mspx mfr true  NOTE  the WMI interface process is also available for performing similar tasks         I m not using it here because the current method covers my needs  but if someday it s needed to extend or improve this  then may want to investigate the WMI tools a vailable   WMI for python   http   tgolden sc sabren com python wmi html  The code       Monitor window processes  derived from   gt for sys available mem http   msdn2 microsoft com en-us library aa455130 aspx   gt  individual process information and python script examples http   www microsoft com technet scriptcenter scripts default mspx mfr true  NOTE  the WMI interface process is also available for performing similar tasks         I m not using it here because the current method covers my needs  but if someday it s needed         to extend or improve this module  then may want to investigate the WMI tools available          WMI for python          http   tgolden sc sabren com python wmi html        revision     3  import win32com client from ctypes import   from ctypes wintypes import   import pythoncom import pywintypes import datetime   class MEMORYSTATUS Structure        fields                        dwLength   DWORD                     dwMemoryLoad   DWORD                     dwTotalPhys   DWORD                     dwAvailPhys   DWORD                     dwTotalPageFile   DWORD                     dwAvailPageFile   DWORD                     dwTotalVirtual   DWORD                     dwAvailVirtual   DWORD                       def winmem        x   MEMORYSTATUS     create the structure     windll kernel32 GlobalMemoryStatus byref x     from cytypes wintypes     return x       class process stats         process stats is able to provide counters of  all   the items available in perfmon      Refer to the self supported types keys for the currently supported  Performance Objects       To add logging support for other data you can derive the necessary data from perfmon      ---------     perfmon can be run from windows  run  menu by entering  perfmon  and enter      Clicking on the     will open the  add counters  menu      From the  Add Counters  dialog  the  Performance object  is the self support types key      -- gt  Where spaces are removed and symbols are entered as text  Ex       Number       Percent      For the items you wish to log add the proper attribute name in the list in the self supported types dictionary      keyed by the  Performance Object  name as mentioned above      ---------      NOTE  The  NETFramework NETCLRMemory  key does not seem to log dotnet 2 0 properly       Initially the python implementation was derived from      http   www microsoft com technet scriptcenter scripts default mspx mfr true             def   init   self process name list    perf object list    filter list                 process names list    the list of all processes to log  if empty log all          perf object list    list of process counters to log         filter list    list of text to filter         print results    boolean  output to stdout                     pythoncom CoInitialize     Needed when run by the same process in a thread          self process name list   process name list         self perf object list   perf object list         self filter list   filter list          self win32 perf base    Win32 PerfFormattedData              Define new datatypes here          self supported types                                          NETFramework NETCLRMemory                                                                                 Name                                                                            NumberTotalCommittedBytes                                                                            NumberTotalReservedBytes                                                                            NumberInducedGC                                                                                NumberGen0Collections                                                                            NumberGen1Collections                                                                            NumberGen2Collections                                                                            PromotedMemoryFromGen0                                                                            PromotedMemoryFromGen1                                                                            PercentTimeInGC                                                                            LargeObjectHeapSize                                                                                                                PerfProc Process                                                                                             Name                                                                              PrivateBytes                                                                              ElapsedTime                                                                              IDProcess    pid                                                                            Caption                                                                              CreatingProcessID                                                                              Description                                                                              IODataBytesPersec                                                                              IODataOperationsPersec                                                                              IOOtherBytesPersec                                                                              IOOtherOperationsPersec                                                                              IOReadBytesPersec                                                                              IOReadOperationsPersec                                                                              IOWriteBytesPersec                                                                              IOWriteOperationsPersec                                                                                                                      def get pid stats self  pid           this proc dict               pythoncom CoInitialize     Needed when run by the same process in a thread         if not self perf object list              perf object list   self supported types keys            for counter type in perf object list              strComputer                   objWMIService   win32com client Dispatch  WbemScripting SWbemLocator               objSWbemServices   objWMIService ConnectServer strComputer  root cimv2                query str      Select   from  s s       self win32 perf base counter type              colItems   objSWbemServices ExecQuery query str     Select   from Win32 PerfFormattedData PerfProc Process    changed from Win32 Thread                      if len colItems   gt  0                          for objItem in colItems                      if hasattr objItem   IDProcess   and pid    objItem IDProcess                               for attribute in self supported types counter type                                   eval str    objItem  s     attribute                                  this proc dict attribute    eval eval str                               this proc dict  TimeStamp     datetime datetime now   strftime   Y- m- d  H  M  S      str datetime datetime now   microsecond   3                              break          return this proc dict             def get stats self                       Show process stats for all processes in given list  if none given return all processes            If filter list is defined return only the items that match or contained in the list         Returns a list of result dictionaries                         pythoncom CoInitialize     Needed when run by the same process in a thread         proc results list              if not self perf object list              perf object list   self supported types keys            for counter type in perf object list              strComputer                   objWMIService   win32com client Dispatch  WbemScripting SWbemLocator               objSWbemServices   objWMIService ConnectServer strComputer  root cimv2                query str      Select   from  s s       self win32 perf base counter type              colItems   objSWbemServices ExecQuery query str     Select   from Win32 PerfFormattedData PerfProc Process    changed from Win32 Thread              try                    if len colItems   gt  0                      for objItem in colItems                          found flag   False                         this proc dict                               if not self process name list                              found flag   True                         else                                Check if process name is in the process name list  allow print if it is                             for proc name in self process name list                                  obj name   objItem Name                                 if proc name lower   in obj name lower      will log if contains name                                     found flag   True                                     break                          if found flag                              for attribute in self supported types counter type                                   eval str    objItem  s     attribute                                  this proc dict attribute    eval eval str                               this proc dict  TimeStamp     datetime datetime now   strftime   Y- m- d  H  M  S      str datetime datetime now   microsecond   3                              proc results list append this proc dict               except pywintypes com error  err msg                    Ignore and continue  proc mem logger calls this function once per second                  continue         return proc results list        def get sys stats            Returns a dictionary of the system stats        pythoncom CoInitialize     Needed when run by the same process in a thread     x   winmem        sys dict                           dwAvailPhys   x dwAvailPhys                       dwAvailVirtual  x dwAvailVirtual                       return sys dict   if   name         main           This area used for testing only     sys dict   get sys stats        stats processor   process stats process name list   process2watch   perf object list    filter list         proc results   stats processor get stats        for result dict in proc results          print result dict      import os     this pid   os getpid       this proc results   stats processor get pid stats this pid       print  this proc results       print this proc results   http   monkut webfactional com blog archive 2009 1 21 windows-process-memory-logging-python

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Here s something I put together a while ago  it s windows only but may help you get part of what you need done   Derived from   for sys available mem  http   msdn2 microsoft com en-us library aa455130 aspx   individual process information and python script examples  http   www microsoft com technet scriptcenter scripts default mspx mfr true  NOTE  the WMI interface process is also available for performing similar tasks         I m not using it here because the current method covers my needs  but if someday it s needed to extend or improve this  then may want to investigate the WMI tools a vailable   WMI for python   http   tgolden sc sabren com python wmi html  The code       Monitor window processes  derived from   gt for sys available mem http   msdn2 microsoft com en-us library aa455130 aspx   gt  individual process information and python script examples http   www microsoft com technet scriptcenter scripts default mspx mfr true  NOTE  the WMI interface process is also available for performing similar tasks         I m not using it here because the current method covers my needs  but if someday it s needed         to extend or improve this module  then may want to investigate the WMI tools available          WMI for python          http   tgolden sc sabren com python wmi html        revision     3  import win32com client from ctypes import   from ctypes wintypes import   import pythoncom import pywintypes import datetime   class MEMORYSTATUS Structure        fields                        dwLength   DWORD                     dwMemoryLoad   DWORD                     dwTotalPhys   DWORD                     dwAvailPhys   DWORD                     dwTotalPageFile   DWORD                     dwAvailPageFile   DWORD                     dwTotalVirtual   DWORD                     dwAvailVirtual   DWORD                       def winmem        x   MEMORYSTATUS     create the structure     windll kernel32 GlobalMemoryStatus byref x     from cytypes wintypes     return x       class process stats         process stats is able to provide counters of  all   the items available in perfmon      Refer to the self supported types keys for the currently supported  Performance Objects       To add logging support for other data you can derive the necessary data from perfmon      ---------     perfmon can be run from windows  run  menu by entering  perfmon  and enter      Clicking on the     will open the  add counters  menu      From the  Add Counters  dialog  the  Performance object  is the self support types key      -- gt  Where spaces are removed and symbols are entered as text  Ex       Number       Percent      For the items you wish to log add the proper attribute name in the list in the self supported types dictionary      keyed by the  Performance Object  name as mentioned above      ---------      NOTE  The  NETFramework NETCLRMemory  key does not seem to log dotnet 2 0 properly       Initially the python implementation was derived from      http   www microsoft com technet scriptcenter scripts default mspx mfr true             def   init   self process name list    perf object list    filter list                 process names list    the list of all processes to log  if empty log all          perf object list    list of process counters to log         filter list    list of text to filter         print results    boolean  output to stdout                     pythoncom CoInitialize     Needed when run by the same process in a thread          self process name list   process name list         self perf object list   perf object list         self filter list   filter list          self win32 perf base    Win32 PerfFormattedData              Define new datatypes here          self supported types                                          NETFramework NETCLRMemory                                                                                 Name                                                                            NumberTotalCommittedBytes                                                                            NumberTotalReservedBytes                                                                            NumberInducedGC                                                                                NumberGen0Collections                                                                            NumberGen1Collections                                                                            NumberGen2Collections                                                                            PromotedMemoryFromGen0                                                                            PromotedMemoryFromGen1                                                                            PercentTimeInGC                                                                            LargeObjectHeapSize                                                                                                                PerfProc Process                                                                                             Name                                                                              PrivateBytes                                                                              ElapsedTime                                                                              IDProcess    pid                                                                            Caption                                                                              CreatingProcessID                                                                              Description                                                                              IODataBytesPersec                                                                              IODataOperationsPersec                                                                              IOOtherBytesPersec                                                                              IOOtherOperationsPersec                                                                              IOReadBytesPersec                                                                              IOReadOperationsPersec                                                                              IOWriteBytesPersec                                                                              IOWriteOperationsPersec                                                                                                                      def get pid stats self  pid           this proc dict               pythoncom CoInitialize     Needed when run by the same process in a thread         if not self perf object list              perf object list   self supported types keys            for counter type in perf object list              strComputer                   objWMIService   win32com client Dispatch  WbemScripting SWbemLocator               objSWbemServices   objWMIService ConnectServer strComputer  root cimv2                query str      Select   from  s s       self win32 perf base counter type              colItems   objSWbemServices ExecQuery query str     Select   from Win32 PerfFormattedData PerfProc Process    changed from Win32 Thread                      if len colItems   gt  0                          for objItem in colItems                      if hasattr objItem   IDProcess   and pid    objItem IDProcess                               for attribute in self supported types counter type                                   eval str    objItem  s     attribute                                  this proc dict attribute    eval eval str                               this proc dict  TimeStamp     datetime datetime now   strftime   Y- m- d  H  M  S      str datetime datetime now   microsecond   3                              break          return this proc dict             def get stats self                       Show process stats for all processes in given list  if none given return all processes            If filter list is defined return only the items that match or contained in the list         Returns a list of result dictionaries                         pythoncom CoInitialize     Needed when run by the same process in a thread         proc results list              if not self perf object list              perf object list   self supported types keys            for counter type in perf object list              strComputer                   objWMIService   win32com client Dispatch  WbemScripting SWbemLocator               objSWbemServices   objWMIService ConnectServer strComputer  root cimv2                query str      Select   from  s s       self win32 perf base counter type              colItems   objSWbemServices ExecQuery query str     Select   from Win32 PerfFormattedData PerfProc Process    changed from Win32 Thread              try                    if len colItems   gt  0                      for objItem in colItems                          found flag   False                         this proc dict                               if not self process name list                              found flag   True                         else                                Check if process name is in the process name list  allow print if it is                             for proc name in self process name list                                  obj name   objItem Name                                 if proc name lower   in obj name lower      will log if contains name                                     found flag   True                                     break                          if found flag                              for attribute in self supported types counter type                                   eval str    objItem  s     attribute                                  this proc dict attribute    eval eval str                               this proc dict  TimeStamp     datetime datetime now   strftime   Y- m- d  H  M  S      str datetime datetime now   microsecond   3                              proc results list append this proc dict               except pywintypes com error  err msg                    Ignore and continue  proc mem logger calls this function once per second                  continue         return proc results list        def get sys stats            Returns a dictionary of the system stats        pythoncom CoInitialize     Needed when run by the same process in a thread     x   winmem        sys dict                           dwAvailPhys   x dwAvailPhys                       dwAvailVirtual  x dwAvailVirtual                       return sys dict   if   name         main           This area used for testing only     sys dict   get sys stats        stats processor   process stats process name list   process2watch   perf object list    filter list         proc results   stats processor get stats        for result dict in proc results          print result dict      import os     this pid   os getpid       this proc results   stats processor get pid stats this pid       print  this proc results       print this proc results   http   monkut webfactional com blog archive 2009 1 21 windows-process-memory-logging-python

User · Answer

The psutil library gives you information about CPU  RAM  etc   on a variety of platforms   psutil is a module providing an interface for retrieving information on running processes and system utilization  CPU  memory  in a portable way by using Python  implementing many functionalities offered by tools like ps  top  and Windows task manager  It currently supports Linux  Windows  OSX  Sun Solaris  FreeBSD  OpenBSD and NetBSD  both 32-bit and 64-bit architectures  with Python versions from 2 6 to 3 5  users of Python 2 4 and 2 5 may use 2 1 3 version     Some examples     usr bin env python import psutil   gives a single float value psutil cpu percent     gives an object with many fields psutil virtual memory     you can convert that object to a dictionary  dict psutil virtual memory    asdict      you can have the percentage of used RAM psutil virtual memory   percent 79 2   you can calculate percentage of available memory psutil virtual memory   available   100   psutil virtual memory   total 20 8  Here s other documentation that provides more concepts and interest concepts   https   psutil readthedocs io en latest

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To get a line-by-line memory and time analysis of your program  I suggest using memory profiler and line profiler  Installation    Time profiler   pip install line profiler   Memory profiler   pip install memory profiler   Install the dependency for a faster analysis   pip install psutil  The common part is  you specify which function you want to analyse by using the respective decorators  Example  I have several functions in my Python file main py that I want to analyse  One of them is linearRegressionfit    I need to use the decorator  profile that helps me profile the code with respect to both  Time  amp  Memory  Make the following changes to the function definition  profile def linearRegressionfit Xt Yt Xts Yts       lr LinearRegression       model lr fit Xt Yt      predict lr predict Xts        More Code  For Time Profiling  Run    kernprof -l -v main py  Output Total time  0 181071 s File  main py Function  linearRegressionfit at line 35  Line        Hits         Time  Per Hit     Time  Line Contents                                                                    35                                            profile     36                                           def linearRegressionfit Xt Yt Xts Yts       37         1         52 0     52 0      0 1      lr LinearRegression       38         1      28942 0  28942 0     75 2      model lr fit Xt Yt      39         1       1347 0   1347 0      3 5      predict lr predict Xts      40                                                41         1       4924 0   4924 0     12 8      print  quot train Accuracy quot  lr score Xt Yt       42         1       3242 0   3242 0      8 4      print  quot test Accuracy quot  lr score Xts Yts    For Memory Profiling  Run    python -m memory profiler main py  Output Filename  main py  Line      Mem usage    Increment   Line Contents                                                      35  125 992 MiB  125 992 MiB    profile     36                             def linearRegressionfit Xt Yt Xts Yts       37  125 992 MiB    0 000 MiB       lr LinearRegression       38  130 547 MiB    4 555 MiB       model lr fit Xt Yt      39  130 547 MiB    0 000 MiB       predict lr predict Xts      40                                  41  130 547 MiB    0 000 MiB       print  quot train Accuracy quot  lr score Xt Yt       42  130 547 MiB    0 000 MiB       print  quot test Accuracy quot  lr score Xts Yts    Also  the memory profiler results can also be plotted using matplotlib using   mprof run main py   mprof plot   Note  Tested on line profiler version    3 0 2 memory profiler version    0 57 0 psutil version    5 7 0  EDIT  The results from the profilers can be parsed using the TAMPPA package  Using it  we can get line-by-line desired plots as

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For CPU details use psutil library      https   psutil readthedocs io en latest  cpu   For RAM Frequency  in MHz  use the built in Linux library dmidecode and manipulate the output a bit     this command needs root permission hence supply your password too  just copy the following commend replacing mypass with your password       import os    os system  echo mypass   sudo -S dmidecode -t memory   grep  Clock Speed    cut -d     -f2        ------------------- Output ---------------------------   1600 MT s     Unknown    1600 MT s    Unknown 0     more specificly   i for i in os popen  echo mypass   sudo -S dmidecode -t memory   grep  Clock Speed    cut -d     -f2   read   split      if i isdigit         -------------------------- output -------------------------      1600    1600

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you can read  proc meminfo to get used memory file1   open   proc meminfo    r     for line in file1       if  MemTotal  in line           x   line split           memTotal   int x 1                if  Buffers  in line           x   line split           buffers   int x 1                if  Cached  in line and  SwapCached  not in line           x   line split           cached   int x 1            if  MemFree  in line           x   line split           memFree   int x 1    file1 close    percentage used   int     memTotal -  buffers   cached   memFree      memTotal   100   print percentage used

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Taken feedback from first response and done small changes                usr bin env python              Execute commond on windows machine to install psutil gt  gt  gt  gt python -m pip install psutil             import psutil              print                                                                                     print   ----------------------CPU Information summary----------------------               print                                                                                        gives a single float value             vcc psutil cpu count               print   Total number of CPUs    vcc               vcpu psutil cpu percent               print   Total CPUs utilized percentage    vcpu                   print                                                                                     print   ----------------------RAM Information summary----------------------               print                                                                                       you can convert that object to a dictionary               print dict psutil virtual memory    asdict                   gives an object with many fields             vvm psutil virtual memory                x dict psutil virtual memory    asdict                 def forloop                    for i in x                      print  i  quot -- quot  x i  1024 1024 1024  Output will be printed in GBs              forloop               print                                                                                     print   ----------------------RAM Utilization summary----------------------               print                                                                                       you can have the percentage of used RAM             print  Percentage of used RAM    psutil virtual memory   percent                   79 2               you can calculate percentage of available memory             print  Percentage of available RAM    psutil virtual memory   available   100   psutil virtual memory   total                   20 8

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We chose to use usual information source for this because we could find instantaneous fluctuations in free memory and felt querying the meminfo data source was helpful   This also helped us get a few more related parameters that were pre-parsed   Code  import os  linux filepath     proc meminfo  meminfo   dict       i split   0  rstrip       int i split   1        for i in open linux filepath  readlines     meminfo  memory total gb     meminfo  MemTotal      2    20  meminfo  memory free gb     meminfo  MemFree      2    20  meminfo  memory available gb     meminfo  MemAvailable      2    20    Output for reference  we stripped all newlines for further analysis      MemTotal  1014500 kB MemFree  562680 kB MemAvailable  646364 kB   Buffers  15144 kB Cached  210720 kB SwapCached  0 kB Active  261476 kB   Inactive  128888 kB Active anon   167092 kB Inactive anon   20888 kB   Active file   94384 kB Inactive file   108000 kB Unevictable  3652 kB   Mlocked  3652 kB SwapTotal  0 kB SwapFree  0 kB Dirty  0 kB Writeback    0 kB AnonPages  168160 kB Mapped  81352 kB Shmem  21060 kB Slab  34492   kB SReclaimable  18044 kB SUnreclaim  16448 kB KernelStack  2672 kB   PageTables  8180 kB NFS Unstable  0 kB Bounce  0 kB WritebackTmp  0 kB   CommitLimit  507248 kB Committed AS  1038756 kB VmallocTotal    34359738367 kB VmallocUsed  0 kB VmallocChunk  0 kB HardwareCorrupted    0 kB AnonHugePages  88064 kB CmaTotal  0 kB CmaFree  0 kB   HugePages Total  0 HugePages Free  0 HugePages Rsvd  0 HugePages Surp    0 Hugepagesize  2048 kB DirectMap4k  43008 kB DirectMap2M  1005568 kB

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Below codes  without external libraries worked for me  I tested at Python 2 7 9  CPU Usage  import os      CPU Pct str round float os popen    grep  cpu    proc stat   awk   usage   2  4  100   2  4  5   END  print usage         readline    2         print results     print  CPU Usage       CPU Pct    And Ram Usage  Total  Used and Free  import os mem str os popen  free -t -m   readlines        Get a whole line of memory output  it will be something like below                total       used       free     shared    buffers     cached n     Mem            925        591        334         14         30        355 n     -   buffers cache         205        719 n     Swap            99          0         99 n     Total         1025        591        434 n    So  we need total memory  usage and free memory   We should find the index of capital T which is unique at this string     T ind mem index  T       Than  we can recreate the string with this information  After T we have   Total           which has 14 characters  so we can start from index of T  14 and last 4 characters are also not necessary  We can create a new sub-string using this information     mem G mem T ind 14 -4      The result will be like 1025        603        422 we need to find first index of the first space  and we can start our substring from from 0 to this index number  this will give us the string of total memory     S1 ind mem G index      mem T mem G 0 S1 ind      Similarly we will create a new sub-string  which will start at the second value   The resulting string will be like 603        422 Again  we should find the index of first space and than the  take the Used Memory and Free memory      mem G1 mem G S1 ind 8   S2 ind mem G1 index      mem U mem G1 0 S2 ind   mem F mem G1 S2 ind 8   print  Summary       mem G print  Total Memory       mem T    MB  print  Used Memory       mem U    MB  print  Free Memory       mem F    MB

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This aggregate all the goodies  psutil   os to get Unix  amp  Windows compatibility  That allows us to get   CPU memory disk  code  import os import psutil    need  pip install psutil  In  32   psutil virtual memory   Out 32   svmem total 6247907328  available 2502328320  percent 59 9  used 3327135744  free 167067648  active 3671199744  inactive 1662668800      buffers 844783616  cached 1908920320  shared 123912192  slab 613048320   In  33   psutil virtual memory   percent Out 33   60 0  In  34   psutil cpu percent   Out 34   5 5  In  35   os sep Out 35        In  36   psutil disk usage os sep  Out 36   sdiskusage total 50190790656  used 41343860736  free 6467502080  percent 86 5   In  37   psutil disk usage os sep  percent Out 37   86 5

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I don t believe that there is a well-supported multi-platform library available  Remember that Python itself is written in C so any library is simply going to make a smart decision about which OS-specific code snippet to run  as you suggested above

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you can read  proc meminfo to get used memory file1   open   proc meminfo    r     for line in file1       if  MemTotal  in line           x   line split           memTotal   int x 1                if  Buffers  in line           x   line split           buffers   int x 1                if  Cached  in line and  SwapCached  not in line           x   line split           cached   int x 1            if  MemFree  in line           x   line split           memFree   int x 1    file1 close    percentage used   int     memTotal -  buffers   cached   memFree      memTotal   100   print percentage used

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Use the psutil library   On Ubuntu 18 04  pip installed 5 5 0  latest version  as of 1-30-2019   Older versions may behave somewhat differently    You can check your version of psutil by doing this in Python   from   future   import print function    for Python2 import psutil print psutil   versi  on      To get some memory and CPU stats   from   future   import print function import psutil print psutil cpu percent    print psutil virtual memory       physical memory usage print  memory   used    psutil virtual memory   2     The virtual memory  tuple  will have the percent memory used system-wide   This seemed to be overestimated by a few percent for me on Ubuntu 18 04   You can also get the memory used by the current Python instance   import os import psutil pid   os getpid   py   psutil Process pid  memoryUse   py memory info   0  2   30    memory use in GB   I think print  memory use    memoryUse    which gives the current memory use of your Python script   There are some more in-depth examples on the pypi page for psutil

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I don t believe that there is a well-supported multi-platform library available  Remember that Python itself is written in C so any library is simply going to make a smart decision about which OS-specific code snippet to run  as you suggested above

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You can use psutil or psmem with subprocess example code   import subprocess cmd     subprocess Popen   sudo     ps mem   stdout subprocess PIPE stderr subprocess PIPE   out error   cmd communicate    memory   out splitlines     Reference  http   techarena51 com index php how-to-install-python-3-and-flask-on-linux   https   github com Leo-g python-flask-cmd

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You can use psutil or psmem with subprocess example code   import subprocess cmd     subprocess Popen   sudo     ps mem   stdout subprocess PIPE stderr subprocess PIPE   out error   cmd communicate    memory   out splitlines     Reference  http   techarena51 com index php how-to-install-python-3-and-flask-on-linux   https   github com Leo-g python-flask-cmd

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I don t believe that there is a well-supported multi-platform library available  Remember that Python itself is written in C so any library is simply going to make a smart decision about which OS-specific code snippet to run  as you suggested above

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Taken feedback from first response and done small changes                usr bin env python              Execute commond on windows machine to install psutil gt  gt  gt  gt python -m pip install psutil             import psutil              print                                                                                     print   ----------------------CPU Information summary----------------------               print                                                                                        gives a single float value             vcc psutil cpu count               print   Total number of CPUs    vcc               vcpu psutil cpu percent               print   Total CPUs utilized percentage    vcpu                   print                                                                                     print   ----------------------RAM Information summary----------------------               print                                                                                       you can convert that object to a dictionary               print dict psutil virtual memory    asdict                   gives an object with many fields             vvm psutil virtual memory                x dict psutil virtual memory    asdict                 def forloop                    for i in x                      print  i  quot -- quot  x i  1024 1024 1024  Output will be printed in GBs              forloop               print                                                                                     print   ----------------------RAM Utilization summary----------------------               print                                                                                       you can have the percentage of used RAM             print  Percentage of used RAM    psutil virtual memory   percent                   79 2               you can calculate percentage of available memory             print  Percentage of available RAM    psutil virtual memory   available   100   psutil virtual memory   total                   20 8

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This aggregate all the goodies  psutil   os to get Unix  amp  Windows compatibility  That allows us to get   CPU memory disk  code  import os import psutil    need  pip install psutil  In  32   psutil virtual memory   Out 32   svmem total 6247907328  available 2502328320  percent 59 9  used 3327135744  free 167067648  active 3671199744  inactive 1662668800      buffers 844783616  cached 1908920320  shared 123912192  slab 613048320   In  33   psutil virtual memory   percent Out 33   60 0  In  34   psutil cpu percent   Out 34   5 5  In  35   os sep Out 35        In  36   psutil disk usage os sep  Out 36   sdiskusage total 50190790656  used 41343860736  free 6467502080  percent 86 5   In  37   psutil disk usage os sep  percent Out 37   86 5

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The psutil library gives you information about CPU  RAM  etc   on a variety of platforms   psutil is a module providing an interface for retrieving information on running processes and system utilization  CPU  memory  in a portable way by using Python  implementing many functionalities offered by tools like ps  top  and Windows task manager  It currently supports Linux  Windows  OSX  Sun Solaris  FreeBSD  OpenBSD and NetBSD  both 32-bit and 64-bit architectures  with Python versions from 2 6 to 3 5  users of Python 2 4 and 2 5 may use 2 1 3 version     Some examples     usr bin env python import psutil   gives a single float value psutil cpu percent     gives an object with many fields psutil virtual memory     you can convert that object to a dictionary  dict psutil virtual memory    asdict      you can have the percentage of used RAM psutil virtual memory   percent 79 2   you can calculate percentage of available memory psutil virtual memory   available   100   psutil virtual memory   total 20 8  Here s other documentation that provides more concepts and interest concepts   https   psutil readthedocs io en latest

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current system status  current CPU  RAM  free disk space  etc     And   nix and Windows platforms  can be a difficult combination to achieve   The operating systems are fundamentally different in the way they manage these resources   Indeed  they differ in core concepts like defining what counts as system and what counts as application time    Free disk space    What counts as  disk space    All partitions of all devices   What about foreign partitions in a multi-boot environment   I don t think there s a clear enough consensus between Windows and  nix that makes this possible   Indeed  there may not even be any consensus between the various operating systems called Windows   Is there a single Windows API that works for both XP and Vista

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Based on the cpu usage code by  Hrabal  this is what I use   from subprocess import Popen  PIPE  def get cpu usage            Get CPU usage on Linux by reading  proc stat          sub   Popen   grep    cpu     proc stat    stdout PIPE  stderr PIPE      top vals    int val  for val in sub communicate   0  split   n   0  split 1 5        return  top vals 0    top vals 2     100    top vals 0    top vals 2    top vals 3

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We chose to use usual information source for this because we could find instantaneous fluctuations in free memory and felt querying the meminfo data source was helpful   This also helped us get a few more related parameters that were pre-parsed   Code  import os  linux filepath     proc meminfo  meminfo   dict       i split   0  rstrip       int i split   1        for i in open linux filepath  readlines     meminfo  memory total gb     meminfo  MemTotal      2    20  meminfo  memory free gb     meminfo  MemFree      2    20  meminfo  memory available gb     meminfo  MemAvailable      2    20    Output for reference  we stripped all newlines for further analysis      MemTotal  1014500 kB MemFree  562680 kB MemAvailable  646364 kB   Buffers  15144 kB Cached  210720 kB SwapCached  0 kB Active  261476 kB   Inactive  128888 kB Active anon   167092 kB Inactive anon   20888 kB   Active file   94384 kB Inactive file   108000 kB Unevictable  3652 kB   Mlocked  3652 kB SwapTotal  0 kB SwapFree  0 kB Dirty  0 kB Writeback    0 kB AnonPages  168160 kB Mapped  81352 kB Shmem  21060 kB Slab  34492   kB SReclaimable  18044 kB SUnreclaim  16448 kB KernelStack  2672 kB   PageTables  8180 kB NFS Unstable  0 kB Bounce  0 kB WritebackTmp  0 kB   CommitLimit  507248 kB Committed AS  1038756 kB VmallocTotal    34359738367 kB VmallocUsed  0 kB VmallocChunk  0 kB HardwareCorrupted    0 kB AnonHugePages  88064 kB CmaTotal  0 kB CmaFree  0 kB   HugePages Total  0 HugePages Free  0 HugePages Rsvd  0 HugePages Surp    0 Hugepagesize  2048 kB DirectMap4k  43008 kB DirectMap2M  1005568 kB

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Based on the cpu usage code by  Hrabal  this is what I use   from subprocess import Popen  PIPE  def get cpu usage            Get CPU usage on Linux by reading  proc stat          sub   Popen   grep    cpu     proc stat    stdout PIPE  stderr PIPE      top vals    int val  for val in sub communicate   0  split   n   0  split 1 5        return  top vals 0    top vals 2     100    top vals 0    top vals 2    top vals 3

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current system status  current CPU  RAM  free disk space  etc     And   nix and Windows platforms  can be a difficult combination to achieve   The operating systems are fundamentally different in the way they manage these resources   Indeed  they differ in core concepts like defining what counts as system and what counts as application time    Free disk space    What counts as  disk space    All partitions of all devices   What about foreign partitions in a multi-boot environment   I don t think there s a clear enough consensus between Windows and  nix that makes this possible   Indeed  there may not even be any consensus between the various operating systems called Windows   Is there a single Windows API that works for both XP and Vista

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For CPU details use psutil library      https   psutil readthedocs io en latest  cpu   For RAM Frequency  in MHz  use the built in Linux library dmidecode and manipulate the output a bit     this command needs root permission hence supply your password too  just copy the following commend replacing mypass with your password       import os    os system  echo mypass   sudo -S dmidecode -t memory   grep  Clock Speed    cut -d     -f2        ------------------- Output ---------------------------   1600 MT s     Unknown    1600 MT s    Unknown 0     more specificly   i for i in os popen  echo mypass   sudo -S dmidecode -t memory   grep  Clock Speed    cut -d     -f2   read   split      if i isdigit         -------------------------- output -------------------------      1600    1600

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Only for Linux   One-liner for the RAM usage with only stdlib dependency   import os tot m  used m  free m   map int  os popen  free -t -m   readlines   -1  split   1      edit  specified solution OS dependency

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I don t believe that there is a well-supported multi-platform library available  Remember that Python itself is written in C so any library is simply going to make a smart decision about which OS-specific code snippet to run  as you suggested above

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Here s something I put together a while ago  it s windows only but may help you get part of what you need done   Derived from   for sys available mem  http   msdn2 microsoft com en-us library aa455130 aspx   individual process information and python script examples  http   www microsoft com technet scriptcenter scripts default mspx mfr true  NOTE  the WMI interface process is also available for performing similar tasks         I m not using it here because the current method covers my needs  but if someday it s needed to extend or improve this  then may want to investigate the WMI tools a vailable   WMI for python   http   tgolden sc sabren com python wmi html  The code       Monitor window processes  derived from   gt for sys available mem http   msdn2 microsoft com en-us library aa455130 aspx   gt  individual process information and python script examples http   www microsoft com technet scriptcenter scripts default mspx mfr true  NOTE  the WMI interface process is also available for performing similar tasks         I m not using it here because the current method covers my needs  but if someday it s needed         to extend or improve this module  then may want to investigate the WMI tools available          WMI for python          http   tgolden sc sabren com python wmi html        revision     3  import win32com client from ctypes import   from ctypes wintypes import   import pythoncom import pywintypes import datetime   class MEMORYSTATUS Structure        fields                        dwLength   DWORD                     dwMemoryLoad   DWORD                     dwTotalPhys   DWORD                     dwAvailPhys   DWORD                     dwTotalPageFile   DWORD                     dwAvailPageFile   DWORD                     dwTotalVirtual   DWORD                     dwAvailVirtual   DWORD                       def winmem        x   MEMORYSTATUS     create the structure     windll kernel32 GlobalMemoryStatus byref x     from cytypes wintypes     return x       class process stats         process stats is able to provide counters of  all   the items available in perfmon      Refer to the self supported types keys for the currently supported  Performance Objects       To add logging support for other data you can derive the necessary data from perfmon      ---------     perfmon can be run from windows  run  menu by entering  perfmon  and enter      Clicking on the     will open the  add counters  menu      From the  Add Counters  dialog  the  Performance object  is the self support types key      -- gt  Where spaces are removed and symbols are entered as text  Ex       Number       Percent      For the items you wish to log add the proper attribute name in the list in the self supported types dictionary      keyed by the  Performance Object  name as mentioned above      ---------      NOTE  The  NETFramework NETCLRMemory  key does not seem to log dotnet 2 0 properly       Initially the python implementation was derived from      http   www microsoft com technet scriptcenter scripts default mspx mfr true             def   init   self process name list    perf object list    filter list                 process names list    the list of all processes to log  if empty log all          perf object list    list of process counters to log         filter list    list of text to filter         print results    boolean  output to stdout                     pythoncom CoInitialize     Needed when run by the same process in a thread          self process name list   process name list         self perf object list   perf object list         self filter list   filter list          self win32 perf base    Win32 PerfFormattedData              Define new datatypes here          self supported types                                          NETFramework NETCLRMemory                                                                                 Name                                                                            NumberTotalCommittedBytes                                                                            NumberTotalReservedBytes                                                                            NumberInducedGC                                                                                NumberGen0Collections                                                                            NumberGen1Collections                                                                            NumberGen2Collections                                                                            PromotedMemoryFromGen0                                                                            PromotedMemoryFromGen1                                                                            PercentTimeInGC                                                                            LargeObjectHeapSize                                                                                                                PerfProc Process                                                                                             Name                                                                              PrivateBytes                                                                              ElapsedTime                                                                              IDProcess    pid                                                                            Caption                                                                              CreatingProcessID                                                                              Description                                                                              IODataBytesPersec                                                                              IODataOperationsPersec                                                                              IOOtherBytesPersec                                                                              IOOtherOperationsPersec                                                                              IOReadBytesPersec                                                                              IOReadOperationsPersec                                                                              IOWriteBytesPersec                                                                              IOWriteOperationsPersec                                                                                                                      def get pid stats self  pid           this proc dict               pythoncom CoInitialize     Needed when run by the same process in a thread         if not self perf object list              perf object list   self supported types keys            for counter type in perf object list              strComputer                   objWMIService   win32com client Dispatch  WbemScripting SWbemLocator               objSWbemServices   objWMIService ConnectServer strComputer  root cimv2                query str      Select   from  s s       self win32 perf base counter type              colItems   objSWbemServices ExecQuery query str     Select   from Win32 PerfFormattedData PerfProc Process    changed from Win32 Thread                      if len colItems   gt  0                          for objItem in colItems                      if hasattr objItem   IDProcess   and pid    objItem IDProcess                               for attribute in self supported types counter type                                   eval str    objItem  s     attribute                                  this proc dict attribute    eval eval str                               this proc dict  TimeStamp     datetime datetime now   strftime   Y- m- d  H  M  S      str datetime datetime now   microsecond   3                              break          return this proc dict             def get stats self                       Show process stats for all processes in given list  if none given return all processes            If filter list is defined return only the items that match or contained in the list         Returns a list of result dictionaries                         pythoncom CoInitialize     Needed when run by the same process in a thread         proc results list              if not self perf object list              perf object list   self supported types keys            for counter type in perf object list              strComputer                   objWMIService   win32com client Dispatch  WbemScripting SWbemLocator               objSWbemServices   objWMIService ConnectServer strComputer  root cimv2                query str      Select   from  s s       self win32 perf base counter type              colItems   objSWbemServices ExecQuery query str     Select   from Win32 PerfFormattedData PerfProc Process    changed from Win32 Thread              try                    if len colItems   gt  0                      for objItem in colItems                          found flag   False                         this proc dict                               if not self process name list                              found flag   True                         else                                Check if process name is in the process name list  allow print if it is                             for proc name in self process name list                                  obj name   objItem Name                                 if proc name lower   in obj name lower      will log if contains name                                     found flag   True                                     break                          if found flag                              for attribute in self supported types counter type                                   eval str    objItem  s     attribute                                  this proc dict attribute    eval eval str                               this proc dict  TimeStamp     datetime datetime now   strftime   Y- m- d  H  M  S      str datetime datetime now   microsecond   3                              proc results list append this proc dict               except pywintypes com error  err msg                    Ignore and continue  proc mem logger calls this function once per second                  continue         return proc results list        def get sys stats            Returns a dictionary of the system stats        pythoncom CoInitialize     Needed when run by the same process in a thread     x   winmem        sys dict                           dwAvailPhys   x dwAvailPhys                       dwAvailVirtual  x dwAvailVirtual                       return sys dict   if   name         main           This area used for testing only     sys dict   get sys stats        stats processor   process stats process name list   process2watch   perf object list    filter list         proc results   stats processor get stats        for result dict in proc results          print result dict      import os     this pid   os getpid       this proc results   stats processor get pid stats this pid       print  this proc results       print this proc results   http   monkut webfactional com blog archive 2009 1 21 windows-process-memory-logging-python

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This script for CPU usage   import os  def get cpu load            Returns a list CPU Loads        result          cmd    WMIC CPU GET LoadPercentage       response   os popen cmd     2 gt  amp 1   r   read   strip   split   r n       for load in response 1           result append int load       return result  if   name         main         print get cpu load

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Here s something I put together a while ago  it s windows only but may help you get part of what you need done   Derived from   for sys available mem  http   msdn2 microsoft com en-us library aa455130 aspx   individual process information and python script examples  http   www microsoft com technet scriptcenter scripts default mspx mfr true  NOTE  the WMI interface process is also available for performing similar tasks         I m not using it here because the current method covers my needs  but if someday it s needed to extend or improve this  then may want to investigate the WMI tools a vailable   WMI for python   http   tgolden sc sabren com python wmi html  The code       Monitor window processes  derived from   gt for sys available mem http   msdn2 microsoft com en-us library aa455130 aspx   gt  individual process information and python script examples http   www microsoft com technet scriptcenter scripts default mspx mfr true  NOTE  the WMI interface process is also available for performing similar tasks         I m not using it here because the current method covers my needs  but if someday it s needed         to extend or improve this module  then may want to investigate the WMI tools available          WMI for python          http   tgolden sc sabren com python wmi html        revision     3  import win32com client from ctypes import   from ctypes wintypes import   import pythoncom import pywintypes import datetime   class MEMORYSTATUS Structure        fields                        dwLength   DWORD                     dwMemoryLoad   DWORD                     dwTotalPhys   DWORD                     dwAvailPhys   DWORD                     dwTotalPageFile   DWORD                     dwAvailPageFile   DWORD                     dwTotalVirtual   DWORD                     dwAvailVirtual   DWORD                       def winmem        x   MEMORYSTATUS     create the structure     windll kernel32 GlobalMemoryStatus byref x     from cytypes wintypes     return x       class process stats         process stats is able to provide counters of  all   the items available in perfmon      Refer to the self supported types keys for the currently supported  Performance Objects       To add logging support for other data you can derive the necessary data from perfmon      ---------     perfmon can be run from windows  run  menu by entering  perfmon  and enter      Clicking on the     will open the  add counters  menu      From the  Add Counters  dialog  the  Performance object  is the self support types key      -- gt  Where spaces are removed and symbols are entered as text  Ex       Number       Percent      For the items you wish to log add the proper attribute name in the list in the self supported types dictionary      keyed by the  Performance Object  name as mentioned above      ---------      NOTE  The  NETFramework NETCLRMemory  key does not seem to log dotnet 2 0 properly       Initially the python implementation was derived from      http   www microsoft com technet scriptcenter scripts default mspx mfr true             def   init   self process name list    perf object list    filter list                 process names list    the list of all processes to log  if empty log all          perf object list    list of process counters to log         filter list    list of text to filter         print results    boolean  output to stdout                     pythoncom CoInitialize     Needed when run by the same process in a thread          self process name list   process name list         self perf object list   perf object list         self filter list   filter list          self win32 perf base    Win32 PerfFormattedData              Define new datatypes here          self supported types                                          NETFramework NETCLRMemory                                                                                 Name                                                                            NumberTotalCommittedBytes                                                                            NumberTotalReservedBytes                                                                            NumberInducedGC                                                                                NumberGen0Collections                                                                            NumberGen1Collections                                                                            NumberGen2Collections                                                                            PromotedMemoryFromGen0                                                                            PromotedMemoryFromGen1                                                                            PercentTimeInGC                                                                            LargeObjectHeapSize                                                                                                                PerfProc Process                                                                                             Name                                                                              PrivateBytes                                                                              ElapsedTime                                                                              IDProcess    pid                                                                            Caption                                                                              CreatingProcessID                                                                              Description                                                                              IODataBytesPersec                                                                              IODataOperationsPersec                                                                              IOOtherBytesPersec                                                                              IOOtherOperationsPersec                                                                              IOReadBytesPersec                                                                              IOReadOperationsPersec                                                                              IOWriteBytesPersec                                                                              IOWriteOperationsPersec                                                                                                                      def get pid stats self  pid           this proc dict               pythoncom CoInitialize     Needed when run by the same process in a thread         if not self perf object list              perf object list   self supported types keys            for counter type in perf object list              strComputer                   objWMIService   win32com client Dispatch  WbemScripting SWbemLocator               objSWbemServices   objWMIService ConnectServer strComputer  root cimv2                query str      Select   from  s s       self win32 perf base counter type              colItems   objSWbemServices ExecQuery query str     Select   from Win32 PerfFormattedData PerfProc Process    changed from Win32 Thread                      if len colItems   gt  0                          for objItem in colItems                      if hasattr objItem   IDProcess   and pid    objItem IDProcess                               for attribute in self supported types counter type                                   eval str    objItem  s     attribute                                  this proc dict attribute    eval eval str                               this proc dict  TimeStamp     datetime datetime now   strftime   Y- m- d  H  M  S      str datetime datetime now   microsecond   3                              break          return this proc dict             def get stats self                       Show process stats for all processes in given list  if none given return all processes            If filter list is defined return only the items that match or contained in the list         Returns a list of result dictionaries                         pythoncom CoInitialize     Needed when run by the same process in a thread         proc results list              if not self perf object list              perf object list   self supported types keys            for counter type in perf object list              strComputer                   objWMIService   win32com client Dispatch  WbemScripting SWbemLocator               objSWbemServices   objWMIService ConnectServer strComputer  root cimv2                query str      Select   from  s s       self win32 perf base counter type              colItems   objSWbemServices ExecQuery query str     Select   from Win32 PerfFormattedData PerfProc Process    changed from Win32 Thread              try                    if len colItems   gt  0                      for objItem in colItems                          found flag   False                         this proc dict                               if not self process name list                              found flag   True                         else                                Check if process name is in the process name list  allow print if it is                             for proc name in self process name list                                  obj name   objItem Name                                 if proc name lower   in obj name lower      will log if contains name                                     found flag   True                                     break                          if found flag                              for attribute in self supported types counter type                                   eval str    objItem  s     attribute                                  this proc dict attribute    eval eval str                               this proc dict  TimeStamp     datetime datetime now   strftime   Y- m- d  H  M  S      str datetime datetime now   microsecond   3                              proc results list append this proc dict               except pywintypes com error  err msg                    Ignore and continue  proc mem logger calls this function once per second                  continue         return proc results list        def get sys stats            Returns a dictionary of the system stats        pythoncom CoInitialize     Needed when run by the same process in a thread     x   winmem        sys dict                           dwAvailPhys   x dwAvailPhys                       dwAvailVirtual  x dwAvailVirtual                       return sys dict   if   name         main           This area used for testing only     sys dict   get sys stats        stats processor   process stats process name list   process2watch   perf object list    filter list         proc results   stats processor get stats        for result dict in proc results          print result dict      import os     this pid   os getpid       this proc results   stats processor get pid stats this pid       print  this proc results       print this proc results   http   monkut webfactional com blog archive 2009 1 21 windows-process-memory-logging-python

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Only for Linux   One-liner for the RAM usage with only stdlib dependency   import os tot m  used m  free m   map int  os popen  free -t -m   readlines   -1  split   1      edit  specified solution OS dependency

User · Answer

current system status  current CPU  RAM  free disk space  etc     And   nix and Windows platforms  can be a difficult combination to achieve   The operating systems are fundamentally different in the way they manage these resources   Indeed  they differ in core concepts like defining what counts as system and what counts as application time    Free disk space    What counts as  disk space    All partitions of all devices   What about foreign partitions in a multi-boot environment   I don t think there s a clear enough consensus between Windows and  nix that makes this possible   Indeed  there may not even be any consensus between the various operating systems called Windows   Is there a single Windows API that works for both XP and Vista

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Below codes  without external libraries worked for me  I tested at Python 2 7 9  CPU Usage  import os      CPU Pct str round float os popen    grep  cpu    proc stat   awk   usage   2  4  100   2  4  5   END  print usage         readline    2         print results     print  CPU Usage       CPU Pct    And Ram Usage  Total  Used and Free  import os mem str os popen  free -t -m   readlines        Get a whole line of memory output  it will be something like below                total       used       free     shared    buffers     cached n     Mem            925        591        334         14         30        355 n     -   buffers cache         205        719 n     Swap            99          0         99 n     Total         1025        591        434 n    So  we need total memory  usage and free memory   We should find the index of capital T which is unique at this string     T ind mem index  T       Than  we can recreate the string with this information  After T we have   Total           which has 14 characters  so we can start from index of T  14 and last 4 characters are also not necessary  We can create a new sub-string using this information     mem G mem T ind 14 -4      The result will be like 1025        603        422 we need to find first index of the first space  and we can start our substring from from 0 to this index number  this will give us the string of total memory     S1 ind mem G index      mem T mem G 0 S1 ind      Similarly we will create a new sub-string  which will start at the second value   The resulting string will be like 603        422 Again  we should find the index of first space and than the  take the Used Memory and Free memory      mem G1 mem G S1 ind 8   S2 ind mem G1 index      mem U mem G1 0 S2 ind   mem F mem G1 S2 ind 8   print  Summary       mem G print  Total Memory       mem T    MB  print  Used Memory       mem U    MB  print  Free Memory       mem F    MB

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This script for CPU usage   import os  def get cpu load            Returns a list CPU Loads        result          cmd    WMIC CPU GET LoadPercentage       response   os popen cmd     2 gt  amp 1   r   read   strip   split   r n       for load in response 1           result append int load       return result  if   name         main         print get cpu load

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Use the psutil library   On Ubuntu 18 04  pip installed 5 5 0  latest version  as of 1-30-2019   Older versions may behave somewhat differently    You can check your version of psutil by doing this in Python   from   future   import print function    for Python2 import psutil print psutil   versi  on      To get some memory and CPU stats   from   future   import print function import psutil print psutil cpu percent    print psutil virtual memory       physical memory usage print  memory   used    psutil virtual memory   2     The virtual memory  tuple  will have the percent memory used system-wide   This seemed to be overestimated by a few percent for me on Ubuntu 18 04   You can also get the memory used by the current Python instance   import os import psutil pid   os getpid   py   psutil Process pid  memoryUse   py memory info   0  2   30    memory use in GB   I think print  memory use    memoryUse    which gives the current memory use of your Python script   There are some more in-depth examples on the pypi page for psutil

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current system status  current CPU  RAM  free disk space  etc     And   nix and Windows platforms  can be a difficult combination to achieve   The operating systems are fundamentally different in the way they manage these resources   Indeed  they differ in core concepts like defining what counts as system and what counts as application time    Free disk space    What counts as  disk space    All partitions of all devices   What about foreign partitions in a multi-boot environment   I don t think there s a clear enough consensus between Windows and  nix that makes this possible   Indeed  there may not even be any consensus between the various operating systems called Windows   Is there a single Windows API that works for both XP and Vista

User · Answer

I feel like these answers were written for Python 2  and in any case nobody s made mention of the standard resource package that s available for Python 3  It provides commands for obtaining the resource limits of a given process  the calling Python process by default   This isn t the same as getting the current usage of resources by the system as a whole  but it could solve some of the same problems like e g   I want to make sure I only use X much RAM with this script

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To get a line-by-line memory and time analysis of your program  I suggest using memory profiler and line profiler  Installation    Time profiler   pip install line profiler   Memory profiler   pip install memory profiler   Install the dependency for a faster analysis   pip install psutil  The common part is  you specify which function you want to analyse by using the respective decorators  Example  I have several functions in my Python file main py that I want to analyse  One of them is linearRegressionfit    I need to use the decorator  profile that helps me profile the code with respect to both  Time  amp  Memory  Make the following changes to the function definition  profile def linearRegressionfit Xt Yt Xts Yts       lr LinearRegression       model lr fit Xt Yt      predict lr predict Xts        More Code  For Time Profiling  Run    kernprof -l -v main py  Output Total time  0 181071 s File  main py Function  linearRegressionfit at line 35  Line        Hits         Time  Per Hit     Time  Line Contents                                                                    35                                            profile     36                                           def linearRegressionfit Xt Yt Xts Yts       37         1         52 0     52 0      0 1      lr LinearRegression       38         1      28942 0  28942 0     75 2      model lr fit Xt Yt      39         1       1347 0   1347 0      3 5      predict lr predict Xts      40                                                41         1       4924 0   4924 0     12 8      print  quot train Accuracy quot  lr score Xt Yt       42         1       3242 0   3242 0      8 4      print  quot test Accuracy quot  lr score Xts Yts    For Memory Profiling  Run    python -m memory profiler main py  Output Filename  main py  Line      Mem usage    Increment   Line Contents                                                      35  125 992 MiB  125 992 MiB    profile     36                             def linearRegressionfit Xt Yt Xts Yts       37  125 992 MiB    0 000 MiB       lr LinearRegression       38  130 547 MiB    4 555 MiB       model lr fit Xt Yt      39  130 547 MiB    0 000 MiB       predict lr predict Xts      40                                  41  130 547 MiB    0 000 MiB       print  quot train Accuracy quot  lr score Xt Yt       42  130 547 MiB    0 000 MiB       print  quot test Accuracy quot  lr score Xts Yts    Also  the memory profiler results can also be plotted using matplotlib using   mprof run main py   mprof plot   Note  Tested on line profiler version    3 0 2 memory profiler version    0 57 0 psutil version    5 7 0  EDIT  The results from the profilers can be parsed using the TAMPPA package  Using it  we can get line-by-line desired plots as

[python] How to get current CPU and RAM usage in Python?

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