[issue21127] Path objects cannot be constructed from str subclasses

[Antony Lee]

Antony Lee added the comment:

I am loading some structure from a MATLAB binary file using scipy.io.loadmat.  This structure contains (in particular) paths (written as bytestrings) to other files which end up being loaded as numpy.str_ objects.

In fact, just trying to store and retrieve strings from numpy arrays wraps them in numpy.str_:

>>> import numpy
>>> type(numpy.array(["foo"])[0])
<class 'numpy.str_'>

... and now trying to construct a Path from that will crash.

I agree, though, that force-casting str subclasses in the constructor may avoid other issues.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue21127>
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