New submission from Alex Waygood <alex.wayg...@gmail.com>:

Hi -- thanks for the report! You haven't given us many details here, but I 
think this is intentional behaviour, not a bug -- this was changed in 
Issue37324. Importing `Mapping` (along with many other names) directly from 
`collections`, instead of from `collections.abc`, has been deprecated since 
Python 3.3, and was removed in Python 3.10. So instead of writing `from 
collections import Mapping`, simply write `from collections.abc import 
Mapping`, and you should find that no error is raised.

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nosy: +AlexWaygood
resolution:  -> not a bug
status: open -> pending

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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue46354>
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