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Author yepan Li
Recipients paul.moore, steve.dower, tim.golden, yepan Li, zach.ware
Date 2020-03-20.02:45:45
SpamBayes Score -1.0
Marked as misclassified Yes
Message-id <1584672345.36.0.799930749688.issue40022@roundup.psfhosted.org>
In-reply-to
Content 
English is very poor so I use Chinese,
这是一个偶然的发现
lis1 = [1,2,3,4,5,6,7,8,9,10]#定义一个列表
lislen = len(lis1)#获得列表长度 此时lislen(列表1)的值为10
lis2 = []*lislen#定义一个新列表长度和第一个列表不一样但是没有元素
print(lis1)#输出测试一下第一个列表正常
for i in lis1:#用i循环遍历数组1
    lis2.insert(lislen,i)#将列表2的第10(lislen)个元素设置为i(i此时为1)
    lislen = lislen-lislen#将lislen(10) = 10(lislen) - 10(lislen) == 0
    #下一次循环应该是lis2.insert(0,i)但是却造成了最终数组倒值的结果
print(lis2)
History
Date User Action Args
2020-03-20 02:45:45yepan Lisetrecipients: + yepan Li, paul.moore, tim.golden, zach.ware, steve.dower
2020-03-20 02:45:45yepan Lisetmessageid: <1584672345.36.0.799930749688.issue40022@roundup.psfhosted.org>
2020-03-20 02:45:45yepan Lilinkissue40022 messages
2020-03-20 02:45:45yepan Licreate