#/usr/bin/env python

class Range(object):
    def __init__(self, start, stop, step):
        self.start, self.stop, self.step = start, stop, step

    def __contains__(self, value):
        return value >= self.start and value < self.stop and \
          (value - self.start) % self.step == 0
          
if __name__ == '__main__':
    r1 = Range(10, int(10e6), 2)
    r2 = range(10, int(10e6), 2)
    
    vals = (8, 9, 10, 11, 10e5, 10e6 - 2, 10e6 - 1, 10e6, 10e6 + 1)
    
    
    print('My range:')
    for val in map(int, vals):
        print(val, val in r1)
        
    print('\nPython''s range:')
    for val in map(int, vals):
        print(val, val in r2)