python - 从列表元组返回随机值

Question

如何从此列表元组返回随机键值？我只关心从移动中返回“r”、“p”或“s”。

# Snippet

moves = [('r', "rock"), ('p', "paper"), ('s', "scissors")]

view_all(moves):
    print "Player moves:"
    for move in moves:
        print " => ".join((move[0], move[1]))

Answer 1

使用 random.choice .

>>> import random
>>> moves = [('r', "rock"), ('p', "paper"), ('s', "scissors")]
>>> random.choice(moves)
('s', 'scissors')

如果只需要元组的第一个值:

random.choice(moves)[0]