相关疑难解决方法(0)

级别:初学者

def play_game(word_list):
    hand = deal_hand(HAND_SIZE) # random init
    while True:
        cmd = raw_input('Enter n to deal a new hand, r to replay the last hand, or e to end game: ')
        if cmd == 'n':
            hand = deal_hand(HAND_SIZE)
            play_hand(hand.copy(), word_list)
            print
        elif cmd == 'r':
            play_hand(hand.copy(), word_list)
            print
        elif cmd == 'e':
            break
        else:
            print "Invalid command."

我的问题:什么是真的？

我认为"虽然真实"是简写但是为了什么？而变量'hand'被赋值？如果变量'hand'没有赋值？该怎么办？