I was curious if there was any efficiency difference between using enumerate() and counting for myself. It appears that enumerate() might be slightly faster.

enum_test.py

def enum_the_old_way():
    i = 0
    for j in myrange:
        i += 1

def enum_the_new_way():
    for i,j in enumerate(myrange):
        pass

myrange = range(10000)

if __name__ == "__main__":
    from timeit import timeit
    
    t1 = timeit("enum_the_old_way()", \
                 setup="from __main__ import enum_the_old_way", \
                 number=10000)
    t2 = timeit("enum_the_new_way()", \
                 setup="from __main__ import enum_the_new_way", \
                 number=10000)
 
    print t1, t2