python: do not alter warnings' filter #1017
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We recently added a couple of `DeprecationWarning`s, and to make sure users would see them, we also set `warnings.simplefilter` to `always`. However, this inadvertently modified the warnings' settings for all other modules as well. This is not nice. This patch removes the edit to the simplefilter (going back to default) and uses `stacklevel`s `warn` argument to increase the `DeprecationWarning` visibiilty. This is not a silver bullet as if one uses the deprecated property "three levels or more" deep, the warning is not visible. Very recent versions of python added the `skip_file_prefixes` argument to `warn`, but it's not worth using it and break compatibility with older versions of python.
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We recently added a couple of
DeprecationWarnings, and to make sure users would see them, we also setwarnings.simplefiltertoalways. However, this inadvertently modified the warnings' settings for all other modules as well. This is not nice.This patch removes the edit to the simplefilter (going back to default) and uses
stacklevelswarnargument to increase theDeprecationWarningvisibiilty. This is not a silver bullet as if one uses the deprecated property "three levels or more" deep, the warning is not visible.To fix this limitation, python 3.12 added the
skip_file_prefixesargument towarn(python/cpython#100840), but it's not worth using it and break compatibility with older versions of python.stacklevel=2should not create any problems (see python/cpython#88462).Fixes #1006.