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Python lru_cache with timeout
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| from datetime import datetime, timedelta | |
| import functools | |
| def timed_cache(**timedelta_kwargs): | |
| def _wrapper(f): | |
| update_delta = timedelta(**timedelta_kwargs) | |
| next_update = datetime.utcnow() + update_delta | |
| # Apply @lru_cache to f with no cache size limit | |
| f = functools.lru_cache(None)(f) | |
| @functools.wraps(f) | |
| def _wrapped(*args, **kwargs): | |
| nonlocal next_update | |
| now = datetime.utcnow() | |
| if now >= next_update: | |
| f.cache_clear() | |
| next_update = now + update_delta | |
| return f(*args, **kwargs) | |
| return _wrapped | |
| return _wrapper |
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