str executing time in python code example

Example 1: how to time a python script

from datetime import datetime
start = datetime.now()
# some kind of code
print(datetime.now() - start)

Example 2: how to use timeit in python 3

import timeit
import_module = "import random"
testcode = ''' 
def test(): 
    return random.randint(10, 100)
'''
print(timeit.repeat(stmt=testcode, setup=import_module))