Prime number generator

prime_number_generator.py

#!/usr/bin/python

from math import ceil

def prime_number_generator():
    '''
    Prime number generator.
    Create an object, keep calling next() to fetch next prime.
    '''    
    yield 2
    
    num = 3
    while True:
        is_not_prime = False
        for number in range(2, int( ceil((num) ** 0.5) + 1)):
            if num % number == 0:
                is_not_prime = True
                break
        if not is_not_prime:
            yield num
        num += 2

if __name__ == '__main__':
    p = prime_number_generator()
    for i in range(100):
        print p.next(),