def add(a: int, b: int) -> int:

Type System & Annotations

Meaning

Defines a function that adds two integers and returns the result. It eliminates the need to repeat addition logic and provides static type checking for the operands. Use it whenever you need a reusable, type‑annotated addition operation across your codebase.

Primary Function

Function definition

Communicative Purpose

Encapsulate addition logic to promote reuse and type safety.

Pattern

def function_name(param1: int, param2: int) -> int:

Core Structure

def ...(...: int, ...: int) -> int:

Função primária

Function definition

Propósito comunicativo

Encapsulate addition logic to promote reuse and type safety.

Situações de gatilho

Data processing: summing integer fields from multiple records; Algorithm implementation: accumulating totals in loops; Testing utilities: providing a simple addition helper for unit tests

Contextos

General‑purpose Python code, educational examples, utility modules, simple scripts.

Padrão

def function_name(param1: int, param2: int) -> int:

Estrutura central

def ...(...: int, ...: int) -> int:

Slots de substituição

function_name: identifier, param1_name: identifier, param2_name: identifier

Colocados típicos

type hints
return statement
docstring
unit test

Substituições comuns

Omit type hints: `def add(a
b): return a + b`
use a lambda: `add = lambda a
b: a + b`

Erros comuns

Omitting type hints, forgetting to return the result, using mutable default arguments, naming parameters the same as built‑ins

Similar / contraste

Lambda expressions provide an anonymous one‑liner for addition, whereas a def creates a named, documentable function

Interferências

Coming from JavaScript: forgetting the colon after the function header or assuming `return` is optional

Família do chunk

function definition
type hinting
utility function
arithmetic helper

Nuance

For trivial addition a lambda or operator.add may be clearer; a separate function adds a named abstraction but can be overkill if overused

Efeito pragmático

Provides a named, type‑checked addition operation, making intent explicit and enabling IDE assistance

Dica de memória

Add two ints with a typed def

Nota

For functional style, consider `operator.add`; avoid mutable default arguments; keep function pure.

Upgrade path

Use generic type variables to support any numeric type, e.g., `def add(a: T, b: T) -> T:` with `from typing import TypeVar`

Frequência: Very highFormulaicidade: Semi-fixedTipo de construção: function definitionPrioridade de aquisição: Active recallPrioridade de output: BothTag de espaçamento: Immediate

Examples

def add(a: int, b: int) -> int: return a + b print(add(3, 5))

def add(a: int, b: int) -> int: """Return the sum of two integers.""" return a + b def _test(): assert add(0, 0) == 0 assert add(-1, 1) == 0 print("All tests passed.") if __name__ == "__main__": _test()

from typing import List def add(a: int, b: int) -> int: return a + b def accumulate(values: List[int], func): total = 0 for v in values: total = func(total, v) return total nums = [1, 2, 3, 4] print(accumulate(nums, add))