(self, key)
return key in self._toc
Return True if the keyed message exists, False otherwise.
Return True if the keyed message exists, False otherwise.
Return True if the keyed message exists False otherwise .
def __contains__(self, key):
        """Return True if the keyed message exists, False otherwise."""
        self._refresh()
        return key in self._toc
def __contains__ ( self , key ) : self . _refresh ( ) return key in self . _toc