New submission from Eryk Sun:
PEP 529 isn't implemented for io.FileIO, and I think it should be. If a UTF-8
path is passed to open(), it ends up calling C _open instead of decoding the
path and calling C _wopen. Also, if a pathlike object is passed to io.FileIO,
it calls PyUnicode_FSConverter on it, converting it to UTF-8 and then passing
it to _open. For example:
>>> p = r'C:\Temp\αβψδ'
>>> os.path.exists(p)
True
>>> open(p.encode())
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
FileNotFoundError: [Errno 2] No such file or directory:
b'C:\\Temp\\\xce\xb1\xce\xb2\xcf\x88\xce\xb4'
>>> io.FileIO(pathlib.Path(p))
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
FileNotFoundError: [Errno 2] No such file or directory:
WindowsPath('C:/Temp/αβψδ')
The Windows implementation should mirror the POSIX implementation via
PyUnicode_FSDecoder.
----------
components: IO, Windows
messages: 286585
nosy: eryksun, paul.moore, steve.dower, tim.golden, zach.ware
priority: normal
severity: normal
stage: needs patch
status: open
title: Implement PEP 529 for io.FileIO
type: behavior
versions: Python 3.6, Python 3.7
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue29409>
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