[issue29741] BytesIO methods don't accept integer types, while StringIO counterparts do

[Oren Milman]

Oren Milman added the comment:

I wrote a patch, but I attach it here and not in a PR, as you haven't approved
adding tests. (I would be happy to open a PR with or without the tests.)
I ran the test module (on my Windows 10), and seems like the patch doesn't
break anything.

also, while running test_memoryio with my added tests, i noticed some places in
Lib/_pyio.py which seemed like they should be changed.
in particular, I changed 'var.__index__' to 'var = var.__index__()' in some
places.
I feel really uncomfortable about that change, as it undos a change committed
by Florent Xicluna in b14930cd93e74cae3b7370262c6dcc7c28e0e712.
Florent, what was the reason for that change?

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keywords: +patch
nosy: +flox
Added file: http://bugs.python.org/file46709/patchDraft1.diff

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