Python中shuffle函数
shuffle() 方法将序列的所有元素随机排序。
下面是语法:
1 import random 2 3 random.shuffle (lst )
lst可以是序列或者元组；
1 >>> import random; 2 >>> indexList=[1,2,4,5,8,6]; 3 >>> indexList 4 [1, 2, 4, 5, 8, 6] 5 >>> random.shuffle(indexList) 6 >>> indexList 7 [1, 2, 4, 5, 8, 6] 8 >>> random.shuffle(indexList) 9 >>> indexList 10 [6, 2, 4, 5, 1, 8] 11 >>> random.shuffle(indexList) 12 >>> indexList 13 [2, 1, 4, 5, 6, 8]
如果是'range'类型,则产生错误：
1 >>> indexList=range(10); 2 >>> type(indexList) 3 <class 'range'> 4 >>> random.shuffle(indexList) 5 Traceback (most recent call last): 6 File "<pyshell#28>", line 1, in <module> 7 random.shuffle(indexList) 8 File "D:\softwareTool\Python\anzhuang_file\lib\random.py", line 272, in shuffle 9 x[i], x[j] = x[j], x[i] 10 TypeError: 'range' object does not support item assignment
