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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def add_graph(self, other):
 """ Add other graph to this graph. @attention: Attributes and labels are not preserved. @type other: graph @param other: Graph """

        self.add_nodes( n for n in other.nodes() if not n in self.nodes() )
        
        for each_node in other.nodes():
            for each_edge in other.neighbors(each_node):
                if (not self.has_edge((each_node, each_edge))):
                    self.add_edge((each_node, each_edge))