def is_adult(age: Age) -> bool: return age >= 18

Type System & Annotations

Meaning

Defines a function that checks whether a given age is at least 18, returning a boolean result. This avoids duplicating the age >= 18 check throughout code, improving readability and maintainability. It is typically reached for when validating user eligibility for age-restricted content or actions.

Primary Function

Condition checking

Communicative Purpose

Avoids duplicative age >= 18 checks by encapsulating the logic in a reusable function.

Pattern

def check_condition(value: int) -> bool: return value >= limit

Core Structure

def ... (...): return ... >= ...

Função primária

Condition checking

Propósito comunicativo

Avoids duplicative age >= 18 checks by encapsulating the logic in a reusable function.

Situações de gatilho

Web application: verifying user age before granting access to restricted content; Data processing: filtering adult participants in a survey dataset; Game development: enabling age-rated features based on player age.

Contextos

Python applications requiring age validation, such as social media platforms, e-commerce sites, or educational software.

Padrão

def check_condition(value: int) -> bool: return value >= limit

Estrutura central

def ... (...): return ... >= ...

Slots de substituição

function_name: descriptive identifier, parameter_name: descriptive identifier, limit: numeric threshold

Colocados típicos

Often used in conditional statements (if check_condition(age): ...)
input validation pipelines
and user access control logic.

Substituições comuns

Inline comparison (value >= limit): avoids function call overhead but duplicates logic
Lambda expression (lambda v: v >= limit): limited reusability
Constant threshold (LIMIT = 18
check against constant): improves maintainability if threshold changes.

Erros comuns

Using assignment instead of comparison (value = limit) causing always True and unintended side effects; Forgetting to return boolean (missing return) leading to None; Misplacing colon after return causing syntax error; Using wrong comparison operator (>) excluding exact age;

Similar / contraste

is_minor(value): returns True for value < limit (inverse logic); validate_age_range(value, min, max): checks both lower and upper bounds; is_adult_v2(value): uses >= 21 for different jurisdiction.

Interferências

Coming from C: may rely on non-zero integer being true and omit comparison → In Python, explicit comparison (value >= limit) is required to produce a boolean.

Família do chunk

is_minor
is_senior
validate_age_range

Nuance

Avoid using this function when the threshold may vary per context and passing a parameter each time is cumbersome; negligible performance impact as it's a simple integer comparison; note that the function assumes numeric input and will raise TypeError for non-numeric types.

Dica de memória

Think of this function as a bouncer at a club door: it checks the ID and gives a clear yes/no on entry.

Nota

Can be generalized with TypeVar and SupportsInt protocol to work with any comparable numeric type.

Frequência: HighFormulaicidade: Semi-fixedPrioridade de aquisição: Automatic productionPrioridade de output: BothTag de espaçamento: Immediate