Get current time in milliseconds in Python

Question

How can I get the current time in milliseconds in Python

User · Answer

Just another solution using the datetime module for Python 3   round datetime datetime timestamp datetime datetime now      1000

User · Answer

After some testing in Python 3 8  I noticed that those options give the exact same result  at least in Windows 10  import time    Option 1 unix time ms 1   int time time ns     1000000    Option 2 unix time ms 2   int time time     1000   Feel free to use the one you like better and I do not see any need for a more complicated solution then this

User · Answer

From version 3 7 you can use time time ns   to get time as passed nano seconds from epoch  So you can do ms   time time ns      1 000 000   to get time in mili-seconds as integer

User · Answer

The simpliest way I ve found to get the current UTC time in milliseconds is     timeutil py import datetime   def get epochtime ms        return round datetime datetime utcnow   timestamp     1000     sample py import timeutil   timeutil get epochtime ms

User · Answer

These multiplications to 1000 for milliseconds may be decent for solving or making some prerequisite acceptable  It could be used to fill a gap in your database which doesn t really ever use it   Although  for real situations which require precise timing it would ultimately fail  I wouldn t suggest anyone use this method for mission-critical operations which require actions  or processing at specific timings   For example  round-trip pings being 30-80ms in the USA    You couldn t just round that up and use it efficiently   My own example requires tasks at every second which means if I rounded up after the first tasks responded I would still incur the processing time multiplied every main loop cycle   This ended up being a total function call every 60 seconds  that s  1440 a day   not too accurate   Just a thought for people looking for more accurate reasoning beyond solving a database gap which never really uses it

User · Answer

another solution is the function you can embed into your own utils py  import time as time   make sure we don t override time def millis        return int round time  time     1000

User · Answer

In versions of Python after 3 7  the best answer is to use time perf counter ns     As stated in the docs  time perf counter   - gt  float  Return the value  in fractional seconds  of a performance counter  i e  a clock with the highest available resolution to measure a short duration  It does include time elapsed during sleep and is system-wide  The reference point of the returned value is undefined  so that only the difference between the results of consecutive calls is valid   time perf counter ns   - gt  int  Similar to perf counter    but return time as nanoseconds  As it says  this is going to use the best counter your system has to offer  and it is specifically designed for using in measuring performance  and therefore tries to avoid the common pitfalls of other timers   It also gives you a nice integer number of nanoseconds  so just divide by 1000000 to get your milliseconds  start   time perf counter ns     do some work duration   time perf counter ns   - start print f quot Your duration was  duration    1000000 ms  quot

User · Answer

If you re concerned about measuring elapsed time  you should use the monotonic clock  python 3    This clock is not affected by system clock updates like you would see if an NTP query adjusted your system time  for example    gt  gt  gt  import time  gt  gt  gt  millis   round time monotonic     1000    It provides a reference time in seconds that can be used to compare later to measure elapsed time

User · Answer

Just sample code   import time timestamp   int time time   1000 0    Output  1534343781311

User · Answer

If you want a simple method in your code that returns the milliseconds with datetime   from datetime import datetime from datetime import timedelta  start time   datetime now      returns the elapsed milliseconds since the start of the program def millis       dt   datetime now   - start time    ms    dt days   24   60   60   dt seconds    1000   dt microseconds   1000 0    return ms

User · Answer

If you use my code  below   the time will appear in seconds  then  after a decimal  milliseconds  I think that there is a difference between Windows and Unix - please comment if there is   from time import time  x   time   print x    my result  on Windows  was   1576095264 2682993   EDIT  There is no difference   Thanks tc0nn

User · Answer

Time since unix  from time import time while True      print str time   1000   ms        r   end       Time since start of program  from time import time init   time   while True      print str  time  -init  1000   ms          r   end      Thanks for your time

User · Answer

def TimestampMillisec64        return int  datetime datetime utcnow   - datetime datetime 1970  1  1   total seconds     1000

User · Answer

time time   may only give resolution to the second  the preferred approach for milliseconds is datetime   from datetime import datetime dt   datetime now   dt microsecond

User · Answer

Using time time    import time  def current milli time        return round time time     1000   Then   gt  gt  gt  current milli time   1378761833768

[python] Get current time in milliseconds in Python?

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