[issue36144] Dictionary union. (PEP 584)

[Brandt Bucher]

Brandt Bucher <brandtbucher at gmail.com> added the comment:

Just to clarify:

If we decide to check isinstance(other, (ChainMap, dict)), '|' should probably be used.

If we decide to check isinstance(other, Mapping), I think the copy/update methods should be used.

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<https://bugs.python.org/issue36144>
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