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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_user(self, username):
 """ Fetch the user from the database The function will return None if the user is not found """


        sql = '''SELECT * FROM user WHERE username = ?'''
        self._db_curs.execute(sql, (username, ))
        user = self._db_curs.fetchone()
        return user