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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, entry_id, query=None):
 """ Gets a single entry by ID. """


        if query is None:
            query = {}

        if self.content_type_id is not None:
            query['content_type'] = self.content_type_id

        normalize_select(query)

        return super(EntriesProxy, self).find(entry_id, query=query)