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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 node_branch(self, astr_node, abranch):
 """ Adds a branch to a node, i.e. depth addition. The given node's md_nodes is set to the abranch's mdict_branch. """

            self.dict_branch[astr_node].node_dictBranch(abranch.dict_branch)