Meaning
Creates a transparent wrapper that forwards all arguments to the original function while preserving its metadata via functools.wraps.
Primary Function
To wrap a function with functools.wraps and forward all arguments unchanged.
Communicative Purpose
Express a transparent pass-through decorator that preserves function metadata.
Pattern
functools.wraps(original)(lambda *args, **kwargs: original(*args, **kwargs))
Core Structure
functools.wraps(callable)(lambda *args, **kwargs: callable(*args, **kwargs))
Função primária
To wrap a function with functools.wraps and forward all arguments unchanged.
Propósito comunicativo
Express a transparent pass-through decorator that preserves function metadata.
Situações de gatilho
When you need a decorator that does nothing but forward calls, e.g., as a base for logging or timing decorators.
Contextos
Used in decorator definitions, especially when preserving __name__, __doc__, etc., is required.
Padrão
functools.wraps(original)(lambda *args, **kwargs: original(*args, **kwargs))
Estrutura central
functools.wraps(callable)(lambda *args, **kwargs: callable(*args, **kwargs))
Slots de substituição
original: callable to wrap; *args, **kwargs: positional and keyword arguments
Colocados típicos
- functools.wraps
- lambda
- *args
- **kwargs
- wrapper
- decorator
- functools
Substituições comuns
- def wrapper(*args
- **kwargs): return original(*args
- **kwargs)
Erros comuns
forgetting to return the result of original(*args, **kwargs); omitting *args/**kwargs; forgetting to return the wrapper function; misplacing functools.wraps
Similar / contraste
functools.partial, functools.update_wrapper, class-based decorator, simple lambda without wraps
Interferências
Omitting return leads to None; missing *args/**kwargs causes TypeError; forgetting to return wrapper results in None being returned instead of the wrapped function
Família do chunk
- functools.wraps
- decorator patterns
- transparent wrappers
- function wrappers
Nuance
The lambda form is concise but less readable for complex logic; using def wrapper improves readability.
Efeito pragmático
Signals a transparent pass-through decorator that preserves function metadata.
Dica de memória
functools.wraps with lambda passthrough
Nota
Useful as a base for building more complex decorators while preserving function signature and docstring.
Upgrade path
functools.wraps with explicit wrapper function (def wrapper(*args, **kwargs): return func(*args, **kwargs))
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