R. David Murray added the comment:
This is working in pretty much the only way it can work. Python is correctly
retrieving the string from the environment (it includes the quotation marks).
It is correctly passing that string to os.path: os.path takes the exact string
that represents the filename. In windows
it would be equally valid to do this:
set dir3="just "" a"" test"
%dir3%\hello.bat
Your "simple fix" would not address that case (and would break existing
programs that rely on the current behavior). There is no way to handle all the
possible variations here. The only thing that can be done is what python does
do: return exactly the string stored in the environment variable, and expect
exactly the filename as input to functions that expect filenames.
In many contexts in Windows it works perfectly fine to have the filename
without quotes around it stored in the environment variable and to use that:
dir %dir1%
works fine, for example. The Windows rules for quoting are non-obvious and not
completely consistent, I'm afraid, and there's nothing python can do to paper
over that fact.
----------
nosy: +r.david.murray
resolution: -> not a bug
stage: -> resolved
status: open -> closed
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<http://bugs.python.org/issue24461>
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