Reference library

Caching & Redis

Cache-aside, TTL, invalidation, hot keys, and in-memory lookup patterns at scale.

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Caching & Redis easy

Redis INCR DECR Counter Mock in Python

Simulate Redis INCR and DECR commands with a Python class to test counter logic without a live Redis server.

redis counter mock
Python 
class RedisCounter:
    def __init__(self):
        self._store = {}

    def incr(self, key: str, amount: int = 1) -> int:
        if key not in self._store:
            self._store[key] = 0
        self._store[key] += amount
        return self._store[key]

    def decr(self, key: str, amount: int = 1) -> int:
     …
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