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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 get_meta_graph_copy(self, tags=None):
 """Returns a copy of a MetaGraph with the identical set of tags."""

    meta_graph = self.get_meta_graph(tags)
    copy = tf_v1.MetaGraphDef()
    copy.CopyFrom(meta_graph)
    return copy