Method decr

django/core/cache/backends/base.py:300–305

Subtract delta from value in the cache. If the key does not exist, raise a ValueError exception.

(self, key, delta=1, version=None)

        return new_value

    def decr(self, key, delta=1, version=None):
        """
        Subtract delta from value in the cache. If the key does not exist,
        raise a ValueError exception.
        """
        return self.incr(key, -delta, version=version)

    async def adecr(self, key, delta=1, version=None):
        return await self.aincr(key, -delta, version=version)