def _matcher(self, other):
        """
        CGRContainer < CGRContainer
        """
        if isinstance(other, CGRContainer):
            return GraphMatcher(other, self, lambda x, y: x == y, lambda x, y: x == y)
        raise TypeError('only cgr-cgr possible')
def _matcher ( self , other ) : if isinstance ( other , CGRContainer ) : return GraphMatcher ( other , self , lambda x , y : x == y , lambda x , y : x == y ) raise TypeError ( 'only cgr-cgr possible' )
CGRContainer < CGRContainer