(self)
return "name" in self.vertex_attributes()
Returns whether the graph is named.

        A graph is named if and only if it has a C{"name"} vertex attribute.
Returns whether the graph is named.
Returns whether the graph is named .
def is_named(self):
        """Returns whether the graph is named.

        A graph is named if and only if it has a C{"name"} vertex attribute.
        """
        return "name" in self.vertex_attributes()
def is_named ( self ) : return "name" in self . vertex_attributes ( )