Add deprecation messages for namespace_packages
#3262
Merged
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Motivation
The docs in https://setuptools.pypa.io/en/latest/userguide/package_discovery.html
and https://packaging.python.org/en/latest/guides/packaging-namespace-packages/
seem to suggest that using
namespace_packages
is a deprecated practice.Summary of changes
namespace_packages
SetuptoolsDeprecationWarning
for the other deprecations insetup.cfg
(SetuptoolsDeprecationWarning
is used broadly instead ofDeprecationWarning
in the code base to make sure the warning message is not accidentally silenced.Closes
Pull Request Checklist
changelog.d/
.(See documentation for details)