STINNER Victor <victor.stin...@haypocalc.com> added the comment:

I patched readline (r81918) and locale (r81914) modules to use 
PyUnicode_FSConverter(). They don't use "z" format anymore to parse a filename.

I checked last functions using "z" format (not "z#" or "z*", only "z") and I 
think that it's ok ("z" can be patched to reject bytes). You can get the full 
list using:

grep -n 'PyArg_Parse[^(]*([^"]*"[^";:]*z[^#*]' */*.c

--

About the difference between s/z and s*/s#/z*/z#: I don't understand why they 
are different, but I think that it's too late to change that. Too much 
functions (and third party modules?) suppose that s*/s#/z*/z# supports buffer 
compatible objects.

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue8949>
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