0.6.4
[bug] The method Region.get_or_create_multi() will not pass to the cache backend if no values are ultimately to be stored, based on the use of the Region.get_or_create_multi.should_cache_fn function. This empty dictionary is unnecessary and can cause API problems for backends like that of Redis. Pull request courtesy Tobias Sauerwein.
[bug] The api.NO_VALUE constant now has a fixed __repr__() output, so that scenarios where this constant’s string value ends up being used as a cache key do not create multiple values. Pull request courtesy Paul Brown.
[bug] A new exception class exception.PluginNotFound is now raised when a particular cache plugin class cannot be located either as a setuptools entrypoint or as a registered backend. Previously, a plain Exception was thrown. Pull request courtesy Jamie Lennox.