python random.shuffle的随机性

Question

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random.shuffle(x[, random])

Shuffle the sequence x in place. The optional argument random is a 0-argument function returning a random float in [0.0, 1.0); by default, this is the function random().

Note that for even rather small len(x), the total number of permutations of x is larger than the period of most random number generators; this implies that most permutations of a long sequence can never be generated.

如果我想重复获取 ['a'..'k'] 的随机排列，似乎 shuffle 不会给我随机性。我的理解对吗？

谢谢!

Answer 1

You don't have anything to worry about.虽然 len(x) 低于 2000，但 random.shuffle 应该可以正常工作。