gistfile1.txt

import sys
def pr(x): 
    sys.stdout.write(str(x)+"\n")

def gen_primes_1a():
    seq = count(2)
    seq = ((x,0) for x in seq)
    while True:
        p,old = seq.next()
        seq = ((x,pr("%i over %i" %(x,p))) for (x,blah) in seq if x%p)
        yield p

print(list(islice(gen_primes_1a(), 10)))


# this shows the problem