freqtrade_origin/freqtrade/configuration/PeriodicCache.py
Matthias 5a546855e6 Import TTLCache from cachetools
Importing from cachetools.ttl is deprecated, and will be removed in 5.0
2021-12-27 19:30:17 +01:00

20 lines
578 B
Python

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