![]() Parameter types are dependent on each other using ParamSpec.Īdditionally, if that callable adds or removes arguments from otherĬallables, the Concatenate operator may be used. batch_proc (, good_cb ) # OK batch_proc (, bad_cb ) # Error! Argument 2 has incompatible type because of # different name and kind in the callbackĬallables which take other callables as arguments may indicate that their def bad_cb ( * vals : bytes, maxitems : int | None ) -> list. def good_cb ( * vals : bytes, maxlen : int | None = None ) -> list. def batch_proc ( data : Iterable, cb_results : Combiner ) -> bytes : for item in data. Vector and list will be treated as interchangeable synonyms:įrom collections.abc import Iterable from typing import Protocol class Combiner ( Protocol ): def _call_ ( self, * vals : bytes, maxlen : int | None = None ) -> list. PEP 655: Marking individual TypedDict items as required or potentially missingĪ type alias is defined by assigning the type to the alias.PEP 612: Parameter Specification Variables.Introducing types.UnionType and the ability to use PEP 604: Allow writing union types as X | Y.PEP 593: Flexible function and variable annotations.PEP 591: Adding a final qualifier to typing.PEP 589: TypedDict: Type Hints for Dictionaries with a Fixed Set of Keys.Introducing types.GenericAlias and the ability to use standard PEP 585: Type Hinting Generics In Standard Collections.PEP 544: Protocols: Structural subtyping (static duck typing).Introducing syntax for annotating variables outside of function ![]()
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