[New-bugs-announce] [issue34444] Module's __file__ should be absolute always ("." in sys.path)

[daniel hahler]

New submission from daniel hahler <python-bugs at thequod.de>:

With "." in sys.path the "__file__" attribute will be a relative path, and therefore cannot be used after "chdir".

This likely affects relative paths in general, but have not tested it.

```
import os
import sys

sys.path.insert(0, '.')

# Importing it before chdir already causes failure.
import imported

os.chdir('/')
print(imported.__file__)  # ./imported.py
assert imported.__file__ == os.path.abspath(imported.__file__)
```

It works for "" in sys.path (https://bugs.python.org/issue18416).

----------
components: Interpreter Core
messages: 323800
nosy: blueyed
priority: normal
severity: normal
status: open
title: Module's __file__ should be absolute always ("." in sys.path)
versions: Python 3.7

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue34444>
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