import random alist=[1,2,3,4,5,6,7] random.shuffle(alist,random=None)
def shuffle(self, x, random=None): if random is None: randbelow = self._randbelow for i in reversed(range(1, len(x))): # pick an element in x[:i+1] with which to exchange x[i] j = randbelow(i+1) x[i], x[j] = x[j], x[i] else: _int = int for i in reversed(range(1, len(x))): # pick an element in x[:i+1] with which to exchange x[i] j = _int(random() * (i+1)) x[i], x[j] = x[j], x[i]
源码没有返回值，打乱的是原列表，所以不能print （random.shuffle(alist,random=None)）
原文：https://www.cnblogs.com/Bin-y/p/10948857.html
