import time
t0= time.clock()
print("Hello")
t1 = time.clock() - t0
print("Time elapsed: ", t1 - t0) # CPU seconds elapsed (floating point)

Time elapsed:  0.0009403145040156798

def f(x):
  return x * x
 
import timeit
timeit.repeat("for x in range(100): f(x)", "from __main__ import f", number=100000)

[2.0640320777893066, 2.0876040458679199, 2.0520210266113281]