Yahya Abou Imran <yahya-abou-im...@protonmail.com> added the comment:

https://mail.python.org/pipermail/python-ideas/2017-December/048489.html

Guido is waiting for objection on this...

I have absolutly no idea why this decision was made.

These tests 
(ttps://github.com/python/cpython/blame/master/Lib/test/test_collections.py#L794):

        non_col_iterables = [_test_gen(), iter(b''), iter(bytearray()),
                             (x for x in []), dict().values()]
        for x in non_col_iterables:
            self.assertNotIsInstance(x, Collection)

were written by Guido himself.

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<https://bugs.python.org/issue32449>
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