Python generic function definitions

E265440

Python generic function definitions are a proposed language feature that allows functions to be parameterized by type variables, enabling more precise static typing and reusable, type-safe code.

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Python generic function definitions canonical 1

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Statements (47)

Predicate Object
instanceOf proposed Python language feature
static typing construct
affects design of typed Python libraries
tooling for IDE autocompletion and refactoring
benefits better error messages from type checkers
more accurate type inference for functions
reduction of code duplication via generic algorithms
stronger guarantees about API contracts
contrastsWith monomorphic function definitions
using Any in type annotations
dependsOn formal specification of type variable semantics
discussedIn Python Enhancement Proposals related to typing
typing-sig mailing list
enables encoding relationships between input and output types
library authors to expose generic APIs
writing functions that work for multiple related types
hasGoal enable functions to be parameterized by type variables
improve precision of static typing in Python
support reusable type-safe code
hasMotivation address limitations of current Generic and TypeVar usage
align Python generics more closely with other mainstream languages
make generic code more concise and expressive
hasProperty backwards compatible with existing Python code in typical proposals
compile-time type parameterization
no effect on runtime semantics in typical designs
inspiredBy generics in languages like Java
parametric polymorphism in functional languages
type parameterization in languages like C#
intendedFor static type checkers such as mypy
static type checkers such as pyre
static type checkers such as pyright
mayInclude support for default type arguments
support for higher-kinded-like patterns via type parameters
syntax for declaring type parameters inline with def
relatedTo PEP 695
Python type system
Python typing module
generic programming
static type checking
type parameterization
type variables
type-safe code reuse
requires support from type checkers to be effective
status proposed and evolving in Python typing ecosystem
usesConcept constraints or bounds on type variables
type parameter lists on function definitions
type variable declaration syntax

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Full triples — surface form annotated when it differs from this entity's canonical label.

PEP 695 affects Python generic function definitions