Number of Ones code eval

numberOfOnes.py

import sys
import math
def numberOfOnes(n):
  mask = 1
  bits = n.bit_length()
  if n < 0:
    bits +=1
  count = 0
  for i in range(0, bits):
    count += n & mask
    n = n >> 1

  print count

test_cases = open(sys.argv[1], 'r')
for test in test_cases:
  if test:
    numberOfOnes(int(test.strip()))

test_cases.close()