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A class for timing code (start/stop, context manager, decorator).

Project description

A class for timing code. A Stopwatch object can be used to time code using its start and stop methods:

from et_stopwatch import Stopwatch

stopwatch = Stopwatch() # create and start the stopwatch
sleep(1)
stopwatch.stop()
print(stopwatch)

stopwatch : 1.003744 s

Use as a context manager:

with Stopwatch(message='This took') as sw: # using a custom message
    for i in range(3):
        sleep(1)
        print(i, sw.stop(), 's') # stop() returns the time since the last call to start|stop in seconds

0 1.004943
1 1.004948
2 1.003404
This took :
    total  : 3.013295 s
    minimum: 1.003404 s
    maximum: 1.004948 s
    mean   : 1.004432 s
    stddev : 0.000727 s
    count  : 3

Since stop was called more than once, some statistics are printed.

Use as a decorator:

@Stopwatch(name="say_hi_and_sleep_two_seconds", ndigits=3) # custom message, print only 3 digits.
def say_hi_and_sleep_two_seconds():
    print("hi")
    sleep(2)

say_hi_and_sleep_two_seconds()

hi
say_hi_and_sleep_two_seconds : 2.003 s

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