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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 put(self, key, value, element):
 """Puts an element in an index under a given key-value pair @params key: Index key string @params value: Index value string @params element: Vertex or Edge element to be indexed"""

        self.neoindex[key][value] = element.neoelement