getting the time taken by the function to run

Question

every time i run this code i get time 0.0, but i want exact time took by the function to run, i tried by increasing the values of arguments. pls help mi !!

import time
from functools import wraps

def calculate_time(function):
    @wraps(function)
    def wrapper(*args, **kwargs):
        print(f"you are calling {function.__name__} function")
        print(f"{function.__doc__}")
        t1 = time.time()
        returned_func = function(*args, **kwargs)
        t2 = time.time()
        total_time = t2 -t1
        print(f"this function took {total_time} seconds")
        return returned_func
    return wrapper

nums = [1, 2, 3, 4, 5, 6, 7, 8, 9, 101, 11, 12, 12, 1000000]

@calculate_time
def squares(n):
    '''this function returns the squares of numbers'''
    return [i**2 for i in range(1, n+1)]

squares(1000)

It works fine for me - took about 0.0004 seconds. Maybe try increasing `n` up to 10000000, then it will take on the order of seconds. What platform are you using? — wjandrea, Jun 06 '20 at 18:04
Related? [How can I time a code segment for testing performance with Pythons timeit?](https://stackoverflow.com/q/2866380/4518341) It goes over some pitfalls of different timing methods, e.g. `time.time()` is not precise enough on Windows. — wjandrea, Jun 06 '20 at 18:07

score 0 · Answer 1 · answered Jun 06 '20 at 18:02

This worked fine for me:

>>> ret = squares(1000)
you are calling squares function
this function returns the squares of numbers
this function took 0.0009975433349609375 seconds
>>> ret = squares(1000000)
you are calling squares function
this function returns the squares of numbers
this function took 0.21860361099243164 seconds

score 0 · Answer 2 · edited Jun 07 '20 at 16:09

0

looks like it worked

printed

you are calling squares function
this function returns the squares of numbers
this function took 0.000997304916381836 seconds

edited Jun 07 '20 at 16:09

wjandrea

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answered Jun 06 '20 at 18:06

john taylor

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getting the time taken by the function to run

2 Answers2