Meaning
Defines a function named safe_divide that takes two float parameters and returns an Optional float, indicating it may return None to signal an error such as division by zero.
Primary Function
Declares the signature of a safe division function that returns an Optional float to indicate success or failure.
Communicative Purpose
Announces the interface of a safe division function, specifying its parameter types and return type to callers.
Pattern
def <name>(a: float, b: float) -> Optional[float]:
Core Structure
def <name>(<param1>: float, <param2>: float) -> Optional[float]:
Função primária
Declares the signature of a safe division function that returns an Optional float to indicate success or failure.
Propósito comunicativo
Announces the interface of a safe division function, specifying its parameter types and return type to callers.
Situações de gatilho
When implementing a safe division utility in Python that needs to return None instead of raising an exception on division by zero or invalid input.
Contextos
Found in utility modules, math helper libraries, or any codebase requiring safe arithmetic operations in Python.
Padrão
def <name>(a: float, b: float) -> Optional[float]:
Estrutura central
def <name>(<param1>: float, <param2>: float) -> Optional[float]:
Slots de substituição
name, param1_type, param2_type, return_type
Colocados típicos
- float
- Optional
- None
- division
- safe
Substituições comuns
- a / b if b != 0 else None
Erros comuns
forgetting to check for None result, leading to TypeError when using the return value as a float
Similar / contraste
regular division a / b which raises ZeroDivisionError on division by zero
Interferências
do not confuse with numpy.divide which has different handling of invalid inputs
Família do chunk
- safe_divide
- safe_divide_with_default
- safe_divide_with_logging
Nuance
returns None instead of raising an exception, allowing the caller to handle missing values explicitly
Efeito pragmático
signals a safe, optional-returning division operation to API users
Dica de memória
think 'safe division returns None on error'
Upgrade path
safe_divide_with_default
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