How can I get a list of locally installed Python modules

Question

I would like to get a list of Python modules  which are in my Python installation  UNIX server    How can you get a list of Python modules installed in your computer

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For anyone wondering how to call pip list from a Python program you can use the following   import pip pip main   list      this will print all the packages

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pip freeze does it all finding packages however one can simply write the following command to list all paths where python packages are    gt  gt  gt  import site  site getsitepackages      usr local lib python2 7 dist-packages     usr lib python2 7 dist-packages

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on windows  Enter this in cmd  c  python libs gt python -m pip freeze

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Solution  Do not use with pip   10 0   My 50 cents for getting a pip freeze-like list from a Python script   import pip installed packages   pip get installed distributions   installed packages list   sorted    s   s     i key  i version       for i in installed packages   print installed packages list    As a  too long  one liner   sorted    s   s     i key  i version  for i in pip get installed distributions       Giving     behave  1 2 4    enum34  1 0    flask  0 10 1    itsdangerous  0 24      jinja2  2 7 2    jsonschema  2 3 0    markupsafe  0 23    nose  1 3 3      parse-type  0 3 4    parse  1 6 4    prettytable  0 7 2    requests  2 3 0     six  1 6 1    vioozer-metadata  0 1    vioozer-users-server  0 1      werkzeug  0 9 4     Scope  This solution applies to the system scope or to a virtual environment scope  and covers packages installed by setuptools  pip and  god forbid  easy install   My use case  I added the result of this call to my flask server  so when I call it with http   example com exampleServer environment I get the list of packages installed on the server s virtualenv  It makes debugging a whole lot easier   Caveats  I have noticed a strange behaviour of this technique - when the Python interpreter is invoked in the same directory as a setup py file  it does not list the package installed by setup py   Steps to reproduce   Create a virtual environment    cd  tmp   virtualenv test env New python executable in test env bin python Installing setuptools  pip   done    source test env bin activate  test env       Clone a git repo with setup py   test env    git clone https   github com behave behave git Cloning into  behave     remote  Reusing existing pack  4350  done  remote  Total 4350  delta 0   reused 0  delta 0  Receiving objects  100   4350 4350   1 85 MiB   418 00 KiB s  done  Resolving deltas  100   2388 2388   done  Checking connectivity    done    We have behave s setup py in  tmp behave    test env    ls  tmp behave setup py  tmp behave setup py   Install the python package from the git repo   test env    cd  tmp behave  amp  amp  pip install    running install     Installed  private tmp test env lib python2 7 site-packages enum34-1 0-py2 7 egg Finished processing dependencies for behave  1 2 5a1   If we run the aforementioned solution from  tmp   gt  gt  gt  import pip  gt  gt  gt  sorted    s   s     i key  i version  for i in pip get installed distributions       behave  1 2 5a1    enum34  1 0    parse-type  0 3 4    parse  1 6 4    six  1 6 1    gt  gt  gt  import os  gt  gt  gt  os getcwd     private tmp    If we run the aforementioned solution from  tmp behave   gt  gt  gt  import pip  gt  gt  gt  sorted    s   s     i key  i version  for i in pip get installed distributions       enum34  1 0    parse-type  0 3 4    parse  1 6 4    six  1 6 1    gt  gt  gt  import os  gt  gt  gt  os getcwd     private tmp behave    behave  1 2 5a1 is missing from the second example  because the working directory contains behave s setup py file   I could not find any reference to this issue in the documentation  Perhaps I shall open a bug for it

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Installation  pip install pkgutil   Code  import pkgutil  for i in pkgutil iter modules None     returns a tuple  path  package name  ispkg flag      print i 1    or you can append it to a list   Sample Output   multiprocessing netrc nntplib ntpath nturl2path numbers opcode pickle pickletools pipes pkgutil

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Warning  Adam Matan discourages this use in pip   10 0  Also  read  sinoroc s comment below  This was inspired by Adam Matan s answer  the accepted one    import tabulate try    from pip import get installed distributions except    from pip  internal utils misc import get installed distributions  tabpackages      for    package in sorted     s  s     i location  i key   i  for i in get installed distributions        tabpackages append  package location  package key  package version    print tabulate tabulate tabpackages     which then prints out a table in the form of  19 33 pi rpi-v3  iot-wifi-2    python  python installed packages py -------------------------------------------  --------------  ------  home pi  local lib python2 7 site-packages  enum-compat     0 0 2  home pi  local lib python2 7 site-packages  enum34          1 1 6  home pi  local lib python2 7 site-packages  pexpect         4 2 1  home pi  local lib python2 7 site-packages  ptyprocess      0 5 2  home pi  local lib python2 7 site-packages  pygatt          3 2 0  home pi  local lib python2 7 site-packages  pyserial        3 4  usr local lib python2 7 dist-packages       bluepy          1 1 1  usr local lib python2 7 dist-packages       click           6 7  usr local lib python2 7 dist-packages       click-datetime  0 2  usr local lib python2 7 dist-packages       construct       2 8 21  usr local lib python2 7 dist-packages       pyaudio         0 2 11  usr local lib python2 7 dist-packages       tabulate        0 8 2 -------------------------------------------  --------------  ------   which lets you then easily discern which packages you installed with and without sudo     A note aside  I ve noticed that when I install a packet once via sudo and once without  one takes precedence so that the other one isn t being listed  only one location is shown   I believe that only the one in the local directory is then listed  This could be improved

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I just use this to see currently used modules   import sys as s s modules keys     which shows all modules running on your python   For all built-in modules use   s modules   Which is a dict containing all modules and import objects

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Aside from using pip freeze I have been installing yolk in my virtual environments

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to get all available modules  run sys modules to get all installed modules  read  installed by pip   you may look at pip get installed distributions     For the second purpose  example code   import pip for package in pip get installed distributions        name   package project name   SQLAlchemy  Django  Flask-OAuthlib     key   package key   sqlalchemy  django  flask-oauthlib     module name   package  get metadata  top level txt     sqlalchemy  django  flask oauthlib     location   package location   virtualenv lib directory etc      version   package version   version number

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There are many way to skin a cat    The most simple way is to use the pydoc function directly from the shell with  pydoc modules But for more information use the tool called pip-date that also tell you the installation dates  pip install pip-date

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In normal shell just use  pydoc modules

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In case you have an anaconda python distribution installed  you could also use   conda list   in addition to solutions described above

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I normally use pip list to get a list of packages  with version    This works in a virtual environment too  of course  To show what s installed in only the virtual environment  not global packages   use pip list --local   Here s documentation showing all the available pip list options  with several good examples

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If we need to list the installed packages in the Python shell  we can use the help command as follows  gt  gt  gt  help  modules package

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Now  these methods I tried myself  and I got exactly what was advertised   All the modules   Alas  really you don t care much about the stdlib  you know what you get with a python install     Really  I want the stuff that I installed    What actually  surprisingly  worked just fine was   pip freeze   Which returned   Fabric  0 9 3 apache-libcloud  0 4 0 bzr  2 3b4 distribute  0 6 14 docutils  0 7 greenlet  0 3 1 ipython  0 10 1 iterpipes  0 4 libxml2-python  2 6 21   I say  surprisingly  because the package install tool is the exact place one would expect to find this functionality  although not under the name  freeze  but python packaging is so weird  that I am flabbergasted that this tool makes sense   Pip 0 8 2  Python 2 7

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If none of the above seem to help  in my environment was broken from a system upgrade and I could not upgrade pip  While it won t give you an accurate list you can get an idea of which libraries were installed simply by looking inside your env gt lib gt python version here  gt site-packages gt    Here you will get a good indication of modules installed

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Since pip version 1 3  you ve got access to   pip list   Which seems to be syntactic sugar for  pip freeze    It will list all of the modules particular to your installation or virtualenv  along with their version numbers   Unfortunately it does not display the current version number of any module  nor does it wash your dishes or shine your shoes

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Here is a python code solution that will return a list of modules installed  One can easily modify the code to include version numbers   import subprocess import sys from pprint import pprint  installed packages   reqs   subprocess check output  sys executable   -m    pip    freeze    decode  utf-8   installed packages   installed packages split   r n   installed packages    pkg split       0  for pkg in installed packages if pkg        pprint installed packages

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help  modules     in a Python shell prompt

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Try these  pip list   or  pip freeze

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I ran into a custom installed python 2 7 on OS X  It required X11 to list modules installed  both using help and pydoc    To be able to list all modules without installing X11 I ran pydoc as http-server  i e    pydoc -p 12345   Then it s possible to direct Safari to http   localhost 12345  to see all modules

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From the shell  ls site-packages   If that s not helpful  you can do this   import sys import os for p in sys path      print os listdir  p     And see what that produces

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I needed to find the specific version of packages available by default in AWS Lambda  I did so with a mashup of ideas from this page  I m sharing it for posterity   import pkgutil    version      0 1 1   def get ver name       try          return str   import   name    version        except          return None  def lambda handler event  context       return            statusCode   200           body                          path   m module finder path                      name   m name                      version   get ver m name                      for m in list pkgutil iter modules                      if m module finder path      var runtime    Uncomment this if you only care about a certain path                            What I discovered is that the provided boto3 library was way out of date and it wasn t my fault that my code was failing  I just needed to add boto3 and botocore to my project  But without this I would have been banging my head thinking my code was bad        statusCode   200     body                  path     var task          name    lambda function          version    0 1 1                      path     var runtime          name    bootstrap          version   null                     path     var runtime          name    boto3          version    1 9 42                      path     var runtime          name    botocore          version    1 12 42                      path     var runtime          name    dateutil          version    2 7 5                      path     var runtime          name    docutils          version    0 14                      path     var runtime          name    jmespath          version    0 9 3                      path     var runtime          name    lambda runtime client          version   null                     path     var runtime          name    lambda runtime exception          version   null                     path     var runtime          name    lambda runtime marshaller          version   null                     path     var runtime          name    s3transfer          version    0 1 13                      path     var runtime          name    six          version    1 11 0                      path     var runtime          name    test bootstrap          version   null                     path     var runtime          name    test lambda runtime client          version   null                     path     var runtime          name    test lambda runtime marshaller          version   null                     path     var runtime          name    urllib3          version    1 24 1                      path     var lang lib python3 7          name      future            version   null              What I discovered was also different from what they officially publish  At the time of writing this         Operating system     Amazon Linux   AMI     amzn-ami-hvm-2017 03 1 20170812-x86 64-gp2   Linux kernel     4 14 77-70 59 amzn1 x86 64   AWS SDK for JavaScript     2 290 0    SDK for Python  Boto 3      3-1 7 74 botocore-1 10 74

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As of pip 10  the accepted answer will no longer work   The development team has removed access to the get installed distributions routine   There is an alternate function in the setuptools for doing the same thing   Here is an alternate version that works with pip 10   import pkg resources installed packages   pkg resources working set installed packages list   sorted    s   s     i key  i version       for i in installed packages   print installed packages list    Please let me know if it will or won t work in previous versions of pip  too

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This will help In terminal or IPython  type  help  modules    then In  1   import                       import press-TAB Display all 631 possibilities   y or n  ANSI                   audiodev               markupbase AptUrl                 audioop                markupsafe ArgImagePlugin         avahi                  marshal BaseHTTPServer         axi                    math Bastion                base64                 md5 BdfFontFile            bdb                    mhlib BmpImagePlugin         binascii               mimetools BufrStubImagePlugin    binhex                 mimetypes CDDB                   bisect                 mimify CDROM                  bonobo                 mmap CGIHTTPServer          brlapi                 mmkeys Canvas                 bsddb                  modulefinder CommandNotFound        butterfly              multifile ConfigParser           bz2                    multiprocessing ContainerIO            cPickle                musicbrainz2 Cookie                 cProfile               mutagen Crypto                 cStringIO              mutex CurImagePlugin         cairo                  mx DLFCN                  calendar               netrc DcxImagePlugin         cdrom                  new Dialog                 cgi                    nis DiscID                 cgitb                  nntplib DistUpgrade            checkbox               ntpath

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Very simple searching using pkgutil iter modules  from pkgutil import iter modules a iter modules   while True      try  x a next       except  break     if  searchstr  in x 1   print x 1

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Works Regardless of Pip Version Run the following in your python editor or IPython  import pkg resources installed packages    d project name  d version for d in pkg resources working set  print installed packages   Read other answers and pulled together this combo  which is quickest and easiest inside Python  Find the specific Packages Conveniently you can then get items from your dict easily  i e  installed packages  pandas    gt  gt   1 16 4

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In ipython you can type  importTab   In the standard Python interpreter  you can type  help  modules     At the command-line  you can use pydoc modules  In a script  call pkgutil iter modules

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This solution is primary based on modules importlib and pkgutil and work with CPython 3 4 and CPython 3 5  but has no support for the CPython 2     Explanation   sys builtin module names - names all built-in modules  look my answer here  pkgutil iter modules   - returns an information about all available modules importlib util find spec   - returns an information about importing module  if exists BuiltinImporter - an importer for built-in modules  docs  SourceFileLoader - an importer for a standard Python module  by default has extension   py   docs  ExtensionFileLoader - an importer for modules as shared library  written on the C or C        Full code  import sys import os import shutil import pkgutil import importlib import collections  if sys version info major    2      raise NotImplementedError  CPython 2 is not supported yet     def main           name this file  module      this module name   os path basename   file    rsplit      0         dict for loaders with their modules     loaders   collections OrderedDict          names s of build-in modules     for module name in sys builtin module names             find an information about a module by name         module   importlib util find spec module name             add a key about a loader in the dict  if not exists yet         if module loader not in loaders              loaders module loader                  add a name and a location about imported module in the dict         loaders module loader  append  module name  module origin          all available non-build-in modules     for module name in pkgutil iter modules               ignore this module         if this module name    module name 1               continue            find an information about a module by name         module   importlib util find spec module name 1              add a key about a loader in the dict  if not exists yet         loader   type module loader          if loader not in loaders              loaders loader                  add a name and a location about imported module in the dict         loaders loader  append  module name  module origin          pretty print     line    -    shutil get terminal size   columns     for loader  modules in loaders items            print   0  n 1    2  n 0   format line  len modules   loader           for module in modules              print   0 30     1   format module 0   module 1      if   name         main         main       Usage  For the CPython3 5  truncated     python3 5 python modules info py  ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ 30   lt class   frozen importlib BuiltinImporter  gt  ------------------------------------------------------------------------------------------------------------------------------------------------------------------------  ast                             built-in  codecs                          built-in  collections                     built-in  functools                       built-in  imp                             None  io                              built-in  locale                          built-in  operator                        built-in  signal                          built-in  sre                             built-in  stat                            built-in  string                          built-in  symtable                        built-in  thread                          built-in                              truncated                                 ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ 227   lt class   frozen importlib external SourceFileLoader  gt  ------------------------------------------------------------------------------------------------------------------------------------------------------------------------   future                          usr local lib python3 5   future   py  bootlocale                       usr local lib python3 5  bootlocale py  collections abc                  usr local lib python3 5  collections abc py  compat pickle                    usr local lib python3 5  compat pickle py  compression                      usr local lib python3 5  compression py  dummy thread                     usr local lib python3 5  dummy thread py  markupbase                       usr local lib python3 5  markupbase py  osx support                      usr local lib python3 5  osx support py  pydecimal                        usr local lib python3 5  pydecimal py  pyio                             usr local lib python3 5  pyio py  sitebuiltins                     usr local lib python3 5  sitebuiltins py                              truncated                                 ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ 64   lt class   frozen importlib external ExtensionFileLoader  gt  ------------------------------------------------------------------------------------------------------------------------------------------------------------------------  bisect                           usr local lib python3 5 lib-dynload  bisect cpython-35m-x86 64-linux-gnu so  bz2                              usr local lib python3 5 lib-dynload  bz2 cpython-35m-x86 64-linux-gnu so  codecs cn                        usr local lib python3 5 lib-dynload  codecs cn cpython-35m-x86 64-linux-gnu so  codecs hk                        usr local lib python3 5 lib-dynload  codecs hk cpython-35m-x86 64-linux-gnu so  codecs iso2022                   usr local lib python3 5 lib-dynload  codecs iso2022 cpython-35m-x86 64-linux-gnu so                              truncated                                   For the CPython3 4  truncated     python3 4 python modules info py ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ 54   lt class   frozen importlib BuiltinImporter  gt  ------------------------------------------------------------------------------------------------------------------------------------------------------------------------  ast                             built-in  bisect                          built-in  codecs                          built-in  collections                     built-in  datetime                        built-in  elementtree                     built-in  functools                       built-in  heapq                           built-in  imp                             None  io                              built-in  locale                          built-in  md5                             built-in  operator                        built-in  pickle                          built-in  posixsubprocess                 built-in  random                          built-in                              truncated                                 ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ 246   lt class   frozen importlib SourceFileLoader  gt  ------------------------------------------------------------------------------------------------------------------------------------------------------------------------   future                          usr lib python3 4   future   py  bootlocale                       usr lib python3 4  bootlocale py  collections abc                  usr lib python3 4  collections abc py  compat pickle                    usr lib python3 4  compat pickle py  dummy thread                     usr lib python3 4  dummy thread py  markupbase                       usr lib python3 4  markupbase py  osx support                      usr lib python3 4  osx support py  pyio                             usr lib python3 4  pyio py                              truncated                                 ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ 44   lt class   frozen importlib ExtensionFileLoader  gt  ------------------------------------------------------------------------------------------------------------------------------------------------------------------------  bz2                              usr lib python3 4 lib-dynload  bz2 cpython-34m-x86 64-linux-gnu so  codecs cn                        usr lib python3 4 lib-dynload  codecs cn cpython-34m-x86 64-linux-gnu so  codecs hk                        usr lib python3 4 lib-dynload  codecs hk cpython-34m-x86 64-linux-gnu so  codecs iso2022                   usr lib python3 4 lib-dynload  codecs iso2022 cpython-34m-x86 64-linux-gnu so  codecs jp                        usr lib python3 4 lib-dynload  codecs jp cpython-34m-x86 64-linux-gnu so  codecs kr                        usr lib python3 4 lib-dynload  codecs kr cpython-34m-x86 64-linux-gnu so  codecs tw                        usr lib python3 4 lib-dynload  codecs tw cpython-34m-x86 64-linux-gnu so  crypt                            usr lib python3 4 lib-dynload  crypt cpython-34m-x86 64-linux-gnu so                              truncated

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There are many ideas  initially I am pondering on these two  pip  cons  not always installed  help  modules    cons  output to console  with broken modules  see ubuntu     can segfault  I need an easy approach  using basic libraries and compatible with old python 2 x And I see the light  listmodules py Hidden in the documentation source directory in 2 5 is a small script that lists all available modules for a Python installation  Pros   uses only imp  sys  os  re  time designed to run on Python 1 5 2 and newer the source code is really compact  so you can easy tinkering with it  for example to pass an exception list of buggy modules  don t try to import them

[python] How can I get a list of locally installed Python modules?

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