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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 CreateVertices(self, points):
 """ Returns a dictionary object with keys that are 2tuples represnting a point. """

        gr = digraph()

        for z, x, Q in points:
            node = (z, x, Q)
            gr.add_nodes([node])

        return gr