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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 updateQTable( self, reward, current_state ):
 """Change q_table to reflect what we have learnt."""

        
        # retrieve the old action value from the Q-table (indexed by the previous state and the previous action)
        old_q = self.q_table[self.prev_s][self.prev_a]
        
        # TODO: what should the new action value be?
        new_q = old_q
        
        # assign the new action value to the Q-table
        self.q_table[self.prev_s][self.prev_a] = new_q