Meaning
Applies caching and a timeout to a function that fetches data from a URL.
Primary Function
Wraps a function to cache its results and enforce a timeout limit.
Communicative Purpose
Indicates that the function should be cached and timed out after a specified duration.
Pattern
@cache_result @timeout(seconds=30) def <function_name>(<params>):
Core Structure
@decorator1 @decorator2 def <func>(<args>):
Função primária
Wraps a function to cache its results and enforce a timeout limit.
Propósito comunicativo
Indicates that the function should be cached and timed out after a specified duration.
Situações de gatilho
When fetching data from external sources where repeated calls are expensive and a timeout is needed to avoid hanging.
Contextos
Used in data fetching utilities, web scraping, API clients, or any function performing I/O with potential latency.
Padrão
@cache_result @timeout(seconds=30) def <function_name>(<params>):
Estrutura central
@decorator1 @decorator2 def <func>(<args>):
Slots de substituição
@<decorator1> @<decorator2> def <func_name>(<params>):
Colocados típicos
- cache_result
- timeout
- fetch_data
- url
- requests
- json
Substituições comuns
- cache_result -> functools.lru_cache
- timeout -> signal.alarm or threading.Timer
Erros comuns
Forgetting to import the decorators, applying decorators in the wrong order, using mutable default arguments that break caching.
Similar / contraste
@lru_cache (no timeout), @timeout alone, @retry decorator.
Interferências
Using mutable objects as cache keys can cause unexpected cache hits or misses.
Família do chunk
- Python decorators
- caching
- timeout
- function decoration
Nuance
The order of decorators matters: @timeout outer, @cache_result inner (or vice versa) changes whether the timeout applies to the cached result or the underlying call.
Efeito pragmático
Signals that the function is safe to call repeatedly and will not hang indefinitely.
Dica de memória
Think of caching a web request with a safety timeout.
Upgrade path
Custom decorator composition or advanced caching policies
Log in to save chunks.