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[Python-Dev] Pathlib enhancements - acceptable inputs and outputs for __fspath__ and os.fspath()

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2016-04-11 21:00 GMT+02:00 Brett Cannon <brett at python.org>:
> I'm -0 on allowing __fspath__ to return bytes, but we can see what others
> think.

With the PEP 383, a bytes filename can be stored as str using the
surrogateescape error handler. So DirEntry can convert a bytes path to
str using os.fsdecode().

A "byte string" is unclear in Python. There is the immutable "bytes"
type. But there is also the mutable "bytearray" type. And the buffer
protocol which can have different shapes.

I like the idea of a simple protocol: only allow a single type, str.

Victor

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