Comment to add to prevent Pylint from issuing warnings on ``from

future.builtins import *``:

# pylint: disable=W0622,W0401

INCOMPATIBLE: array.array()

Python 2:

>>> array.array(b'b')

array.array(b'b')

>>> array.array(u'u')

TypeError: must be char, not unicode

Python 3:

>>> array.array(b'b')

TypeError: must be a unicode character, not bytes

>>> array.array(u'b')

array('b')

Maybe use on Py2:

>>> array.array(u'b'.encode('ascii')) ??

Long int syntax (e.g. 1000000L) is incompatible with Py3.

We probably shouldn't shadow int with long on Py2 because then isinstance(1, int) is False

Python 2's bytes object is nothing like Python 3's bytes object!

Running test_bytes.py from Py3 on Py2 (after fixing imports) gives this:

--------------------------------------------------------------

Ran 203 tests in 0.209s

FAILED (failures=31, errors=55, skipped=1)