Comparing with dis

gistfile1.txt

import dis

def for_version():
    y = 0
    for x in [1, 2, 3]:
        y += x * 2

def iter_version():
    _gen_ = iter([1, 2, 3])
    y = 0

    try:
        while True:
            y += next(_gen_) * 2
    except StopIteration:
        pass

dis.dis(for_version)
dis.dis(iter_version)