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[python] 每日一库 -- random

2011-06-03 19:42:41| 分类： lang_python | 标签： |举报 |字号大中小订阅

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python 的 random lib 真实周到，啥函数都有了。高端的我们用不上，列几个常用的：

随机 [0.0, 1.0)

>>> random.random()

0.906031934904587

多选一

>>> random.choice(['hello', 'good', 'wawa'])

'hello'

随机整数 [a, b]

>>> random.randint(1,10)

8

浮点数随机 [a, b) or [a, b]

>>> random.uniform(1,3.5)

1.3921060878073936

从中选取2个不重复的元素

>>> random.sample([1,2,3,4,5,6], 2)

[6, 3]

乱顺

>>> a = [1,2,3,4,5,6]

>>> random.shuffle(a)

>>> a

[3, 5, 2, 6, 1, 4]

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