def _put(self, keyname, value):
"""
Insert a keyname/value pair into the datastore for the session.
Args:
keyname: The keyname of the mapping.
value: The value of the mapping.
"""
keyname = self._validate_key(keyname)
if value is None:
raise ValueError("You must pass a value to put.")
sessdata = self._get(keyname=keyname)
if sessdata is None:
sessdata = UserSessionData()
sessdata.session = self.session
sessdata.keyname = keyname
sessdata.content = pickle.dumps(value)
self.cache[keyname] = pickle.dumps(value)
sessdata.put()
self._set_memcache()
