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PEP 705: fix typo in "Motivation" section. #3640

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Feb 5, 2024
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PEP 705: fix typo in "Motivation" section. #3640

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2 changes: 1 addition & 1 deletion peps/pep-0705.rst
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Expand Up @@ -118,7 +118,7 @@ However, this no longer works once you start nesting dictionaries::
d["name"] = name
update_metadata_timestamp(d) # Type check error: "metadata" is not of type HasTimestamp

This looks like an error, but is simply due to the (unwanted) ability to overwrite the ``metadata`` item held by the ``HasTimestampedMetadata`` instance with a different ``HasTimestamp`` instance, that may no longer be a ``UserAudit`` instance.
This looks like an error, but is simply due to the (unwanted) ability to overwrite the ``metadata`` item held by the ``HasTimestampedMetadata`` instance with a different ``HasTimestamp`` instance, that may no longer be a ``Logs`` instance.

It is possible to work around this issue with generics (as of Python 3.11), but it is very complicated, requiring a type parameter for every nested dict.

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