import random
SEED = 448
myList = [ 'list', 'elements', 'go', 'here' ]
random.seed(SEED)
random.shuffle(myList)
print myList
结果是
['here', 'go', 'list', 'elements']
您的列表现已伪随机化。
“伪”很重要，因为所有具有相同种子和项目数的列表将以相同的“随机”顺序返回。我们可以用它来改变您的清单；如果它确实是随机的，那将是不可能的。
Order = list(range(len(myList)))
# Order is a list having the same number of items as myList,
# where each position's value equals its index
random.seed(SEED)
random.shuffle(Order)
# Order is Now shuffled in the same order as myList;
# so each position's value equals its original index
originalList = [0]*len(myList) # empty list, but the right length
for index,originalIndex in enumerate(Order):
originalList[originalIndex] = myList[index]
# copy each item back to its original index
print originalList
结果是
['list', 'elements', 'go', 'here']
多田 originalList现在是myList的原始顺序。
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