AttributeError: module 'time' has no attribute 'clock' for Reaction Test

Every time I run my code it says this:

Traceback (most recent call last):
  File "/Users/syedrishad/PycharmProjects/OpenCVPython/venv/Reaction Test.py", line 14, in <module>
    tic = time.clock()
AttributeError: module 'time' has no attribute 'clock'

I understand that it got removed but now I don't know how to alter my program. Can someone please fix it. It's supposed to be a reaction test.

import time, random

rounds = int(input('How many rounds do you want to play?'))
times = []

for i in range(0,rounds):
    print('when I say __GO__ you hit ENTER!. got it?')
    time.sleep(1)
    print('ready')
    time.sleep(1)
    print('steady')
    time.sleep(random.randint(2,5))
    print('#####__GO__######')
    tic = time.clock()
    a = input()
    toc = time.clock()
    timeSpent = toc-tic
    times.append(timeSpent)
    print('your time was '+str(timeSpent) + ' seconds')


print('fastest time was ' + str(min(times)))
print('slowest time was ' + str(max(times)))
average = sum(times)/len(times)
print('the average time was ' + str(average))

Any help would be appreciated. I've been stumped over this for a while now.