[New-bugs-announce] [issue41560] pathlib.Path.glob fails on empty string

[Alexander Heger]

New submission from Alexander Heger <alex.heger at gmail.com>:

Passing an empty string to pathlib.Path.glob fails.

Example
```
from pathlib import Path
path = Path('./myfile.txt')
path.glob('')
```

The result is:
```
~/Python/lib/python3.8/pathlib.py in glob(self, pattern)
   1129         """
   1130         if not pattern:
-> 1131             raise ValueError("Unacceptable pattern: {!r}".format(pattern))
   1132         drv, root, pattern_parts = self._flavour.parse_parts((pattern,))
   1133         if drv or root:

ValueError: Unacceptable pattern: ''
```

This is not the desired or expected behaviour, which would be to just return `path` if it exists.  This behaviour is also inconsistent with the documentation which states (Python 3.8.5):
"""
Glob the given relative pattern in the directory represented by this path, yielding all matching files (of any kind):
"""

And it is in contrast to the behaviour of glob.glob, which is just fine with the empty string, returning an empty list.

----------
components: Library (Lib)
messages: 375499
nosy: alex.heger
priority: normal
severity: normal
status: open
title: pathlib.Path.glob fails on empty string
type: crash
versions: Python 3.8

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue41560>
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