Daniel Stutzbach <dan...@stutzbachenterprises.com> added the comment:

Attached is a script to find all of the mismatches between the C and Python 
implementations.  There are several.  Below is the output:

RawIOBase C is missing: ['readinto', 'write']
StringIO C is missing: ['name']
StringIO python is missing: ['__getstate__', '__setstate__']
BufferedRandom python is missing: ['raw']
BlockingIOError python is missing: ['characters_written']
TextIOWrapper python is missing: ['buffer']
BufferedReader python is missing: ['raw']
BufferedWriter python is missing: ['raw']
BytesIO python is missing: ['__setstate__']

Since the Python version was the original reference implementation, adding the 
attributes missing from the C side seems to be a straightforward decision (and 
it should simply match whatever the Python version does).  It looks like a 
number of new attributes have creeped into the C side, which will require more 
thoughtful decision making.

We should probably double-check that each of these is documented, while we're 
at it.

----------
priority: low -> normal
resolution:  -> accepted
title: RawIOBase doesn't define readinto -> Python and C implementations of io 
are out of sync
Added file: http://bugs.python.org/file18889/missing_methods.py

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<http://bugs.python.org/issue9858>
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