def purge_cache(self, object_type):
if object_type in self.mapping:<EOL><INDENT>cache = self.mapping[object_type]<EOL>log.debug("<STR_LIT>".format(object_type, len(cache)))<EOL>cache.purge()<EOL><DEDENT>
Purge the named cache of all values. If no cache exists for object_type, nothing is done