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20 lines
582 B
Python
20 lines
582 B
Python
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from datetime import datetime, timezone
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from cachetools.ttl import TTLCache
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class PeriodicCache(TTLCache):
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"""
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Special cache that expires at "straight" times
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A timer with ttl of 3600 (1h) will expire at every full hour (:00).
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"""
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def __init__(self, maxsize, ttl, getsizeof=None):
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def local_timer():
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ts = datetime.now(timezone.utc).timestamp()
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offset = (ts % ttl)
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return ts - offset
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# Init with smlight offset
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super().__init__(maxsize=maxsize, ttl=ttl-1e-5, timer=local_timer, getsizeof=getsizeof)
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