New submission from Karel <biosthez...@centrum.cz>:
The standard `wave` library tries to close a file unconditionally. I believe
this is wrong.
>From the docs:
Wave_write.close(): Make sure nframes is correct, and close the file if it was
opened by wave. *This method is called upon object collection.* [...]
This leads to problems when an exception is throw when a file is open. See the
following MWE:
```
from io import BytesIO
import wave
audio_out = BytesIO()
with wave.open(audio_out, "w") as file_out:
raise Exception('aaa!')
Error: # channels not specified
```
Even when I remove the context manager, so it shouldn't close the file
automatically, it still does, the following:
```
file_out = wave.open(audio_out, "w")
raise Exception('aaa!')
```
doesn't throw an error at me immediately, but when the file_out variable is
running out of scope, I get a printout saying: `Exception ignored in: <bound
method Wave_write.__del__ of <wave.Wave_write object at 0x7ff549064eb8>> [...]
wave.Error: # channels not specified`.
Expected behaviour: When I use a Wave_write object as a context manager, it
tries to close the file unconditionally (as it does now). When I call
`wave.open` manually, no automatic file closing is done.
----------
components: Library (Lib)
messages: 376634
nosy: biosthezerg
priority: normal
severity: normal
status: open
title: Wave shouldn't try to close an open file at all costs
type: behavior
versions: Python 3.7
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue41752>
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