PEP 653: Remove MATCH_POSITIONAL and make semantics for MATCH_DEFAULT near identical to PEP 634. #1893
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This cuts down PEP 563 to make it feasible to get into 3.10.
The
MATCH_POSITIONALand__deconstruct__features can wait for 3.11.Semantics for
MATCH_DEFAULTare near identical to PEP 634.The logic for matching sequences and mappings has been simplified.