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Code Issues Projects Releases Packages Wiki Activity Actions 13

bpo-42128: Structural Pattern Matching (PEP 634) (GH-22917)

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Co-authored-by: Guido van Rossum <guido@python.org>
Co-authored-by: Talin <viridia@gmail.com>
Co-authored-by: Pablo Galindo <pablogsal@gmail.com>
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Brandt Bucher 2021-02-26 14:51:55 -08:00 • committed by GitHub
parent cc02b4f2e8
commit 145bf269df
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43 changed files with 10867 additions and 2607 deletions
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12
Lib/dataclasses.py
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@ -152,6 +152,15 @@ __all__ = ['dataclass',
#
# See _hash_action (below) for a coded version of this table.
# __match_args__
#
# | no | yes | <--- class has __match_args__ in __dict__?
# +=======+=======+
# | add | | <- the default
# +=======+=======+
# __match_args__ is always added unless the class already defines it. It is a
# tuple of __init__ parameter names; non-init fields must be matched by keyword.
# Raised when an attempt is made to modify a frozen class.
class FrozenInstanceError(AttributeError): pass
@ -1007,6 +1016,9 @@ def _process_class(cls, init, repr, eq, order, unsafe_hash, frozen):
cls.__doc__ = (cls.__name__ +
str(inspect.signature(cls)).replace(' -> NoneType', ''))
if '__match_args__' not in cls.__dict__:
cls.__match_args__ = tuple(f.name for f in flds if f.init)
abc.update_abstractmethods(cls)
return cls