Get the execution time of a python script

timing.py

#python3

# Source: https://stackoverflow.com/questions/1557571/how-do-i-get-time-of-a-python-programs-execution/12344609#12344609

import atexit
from time import time
from datetime import timedelta

def secondsToStr(t):
    return str(timedelta(seconds=t))

line = "="*40
def log(s, elapsed=None):
    print(line)
    print(secondsToStr(time()), '-', s)
    if elapsed:
        print("Elapsed time:", elapsed)
    print(line)
    print()

def endlog():
    end = time()
    elapsed = end-start
    log("End Program", secondsToStr(elapsed))

def now():
    return secondsToStr(time())

start = time()
atexit.register(endlog)
log("Start Program")

It's possible to call timing.log from within the program if there are significant stages within the program we want to show. But just including import timing will print the start and end times, and overall elapsed time. The function secondsToStr just formats a floating point number of seconds to hh:mm:ss.sss form.

Another method to do this - but not so pythonic - is this:

import time
start_time = time.time()
main()
print("--- %s seconds ---" % (time.time() - start_time))