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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, key, index=None):
 """Retrieves a value associated with a key from the database Args: key (str):
 The key to retrieve """

        records = self.get_multi([key], index=index)

        try:
            return records[0][1]  # return the value from the key/value tuple
        except IndexError:
            return None