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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 find(self, key, perfect=False):
 """ Find a key path in the tree, matching wildcards. Return value for key, along with index path through subtree lists to the result. Throw ``KeyError`` if the key path doesn't exist in the tree. """

        return find_in_tree(self.root, key, perfect)