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This article mainly introduces python how to obtain millisecond time related knowledge, detailed and easy to understand, simple and fast operation, has a certain reference value, I believe that everyone will have a harvest after reading this python how to obtain millisecond time article, let's take a look at it.

Getting ms-level system time in python can be obtained by importing datetimeprint(datetime.datetime.now ().microsecond)

However, by testing with the following code, it is found that the value returned is not the value of ms, but the value of us:

import datetime def getTime_ms(): return (datetime.datetime.now().hour*3600 + datetime.datetime.now().minute*60+ datetime.datetime.now().second )*1000+ datetime.datetime.now().microsecond/1000 def timetime(): t = getTime_ms() while getTime_ms() - t

< 500: pass a = getTime_ms() print(t, a, a- t) if __name__ == '__main__': from timeit import timeit t = timeit('timetime()', 'from __main__ import timetime', number=1) print(t) 打印结果 (35460614, 35461114, 500) 0.499531984329 上面实验不太直观，换一个直观点的：def timetime(): t1 = datetime.datetime.now() while 1: t2 = datetime.datetime.now() if (t2 - t1).microseconds >

= 1: print(t2,t2.microsecond,t1,t1.microsecond,(t2-t1).seconds) break if __name__ == '__main__': from timeit import timeit t = timeit('timetime()', 'from __main__ import timetime', number=1) print(t) #print (datetime.datetime.now())

output

(datetime.datetime(2019, 4, 3, 10, 6, 20, 461882), 461882, datetime.datetime(2019, 4, 3, 10, 6, 20, 461863), 461863, 0) 7.10487365723e-05

def timetime(): t1 = datetime.datetime.now() while 1: t2 = datetime.datetime.now() if (t2 - t1).microseconds >= 1000: print(t2,t2.microsecond,t1,t1.microsecond,(t2-t1).seconds) break if __name__ == '__main__': from timeit import timeit t = timeit('timetime()', 'from __main__ import timetime', number=1) print(t) #print (datetime.datetime.now())

output

(datetime.datetime(2019, 4, 3, 10, 13, 52, 76548), 76548, datetime.datetime(2019, 4, 3, 10, 13, 52, 75547), 75547, 0) 0.00104904174805

Python datetime removes milliseconds and returns the current time

datetime module returns the current time import datetimeif __name__ == '__main__': a = datetime.datetime.now().replace(microsecond=0) print(a, type(a))

Result of calculation:

2020-05-22 12:13:42 Process finished with exit code 0

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