#!/usr/bin/env python

def seq_func1(key_genfunc, num_elem):
    for N in xrange(num_elem):
        key_genfunc()

                         
def seqtest():
    num_elem = 100

    key_src = range(num_elem+1)
    
    keynums1 = range(len(key_src))
    nextkey1 = lambda N=keynums1,K=key_src: K[N.pop()]
    seq_func1(nextkey1, num_elem)

    keynums2 = range(len(key_src))
    nextkey2 = lambda N=keynums2,K=key_src: K[N.pop()]
    seq_func1(nextkey2, num_elem+2)


if __name__ == "__main__":
    seqtest()