six.Iterator demo

console_output

$ python2 SixIteratorTest.py
1
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8

$ python3 SixIteratorTest.py
1
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8

$ python2 --version
Python 2.7.13

$ python3 --version
Python 3.6.1

SixIteratorTest.py

import six

class Test(six.Iterator):
    def __init__(self, init):
        self.init = init

    def __iter__(self):
        return self

    def __next__(self):
        self.init += 1
        return self.init

if __name__=="__main__":
    x = Test(0)
    for i,thing in enumerate(x):
        print(thing)
        if i>6:
            break