random.choice(sequence)
从序列中随机获取一个元素，list, tuple, 字符串都属于sequence。这里的sequence 需要是有序类型。random.randrange(10,100,2)在结果上与 random.choice(range(10,100,2) 等效。
>>> random.choice(("stone","scissors","paper"))
'stone'
>>> random.choice(["stone","scissors","paper"])
'scissors'
>>> random.choice("Random")
'm'
random.shuffle(x[,random])
用于将列表中的元素打乱，俗称为洗牌。会修改原有序列。
>>> poker = ["A","2","3","4","5","6","7","8","9","10","J","Q","K"]
>>> random.shuffle(poker)
>>> poker
['4', '10', '8', '3', 'J', '6', '2', '7', '9', 'Q', '5', 'K', 'A']
random.sample(sequence,k)
从指定序列中随机获取k个元素作为一个片段返回，sample函数不会修改原有序列。
>>> poker = ["A","2","3","4","5","6","7","8","9","10","J","Q","K"]
>>> random.sample(poker,5)
['4', '3', '10', '2', 'Q']
上述几个方式是Python常用的一些方法，但是关于随机数还有很多的故事。下回分解~
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