[issue32236] open() shouldn't silently ignore buffering=1 in binary mode

[Antoine Pitrou]

Antoine Pitrou <pitrou at free.fr> added the comment:

> I suggest to raise a ValueError if buffering=1 is used for binary mode.

Either that, or we instead accept buffering=1 as a regular buffer size.  But since buffering=1 means something else for text mode, maybe you're right that it's better to raise in binary mode, to avoid any possible confusion.

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nosy: +benjamin.peterson, stutzbach

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<https://bugs.python.org/issue32236>
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