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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(self, id):
 """ Return an instance based on the given primary key identifier, or None if not found. This returns a record whether active or not. """

        ctx = self.context.copy()
        ctx['active_test'] = False
        results = self.rpc_model.search_read(
            [('id', '=', id)],
            None, None, None, self.fields,
            context=ctx
        )
        return results and results[0] or None