[已解决]为什么会出错

timeislife

1. from random import randint
   
2. def password():
   
3.     list1 = ["3","4","6","7","8","9","A","B","C","D","E","F","G","H","J","K","L","M","N","P","Q","R","T","U","V","W","X","Y","Z"]
   
4.     list2 = []
   
5.     i = 0
   
6.     while i<12:
   
7.         i+=1
   
8.         list2.append(list1[randint(0,27)])
   
9.     print(sum(list2))
   
10. password()

复制代码

程序运行后说typeerror:undorable types of + : str() and int()
明明list1里面都是字符串呀，怎么会有int()呢？

最佳答案

月排行榜 / 总排行榜

天黑收衣服

2017-10-10 22:17:28

timeislife 发表于 2017-10-9 12:02
我知道但是int类型根本不存在列表里

TypeError: sum() can't sum strings [use ''.join(seq) instead
测试之后可得知字符串不能求和
这边Shell同時也建议用join取代sum
如版主所改写的部分
print(''.join(list2))
最后返回到password()列表就会变int打印出来了

跳转到最佳答案楼层

新手·ing

1. from random import randint
   
2. def password():
   
3.     list1 = ["3","4","6","7","8","9","A","B","C","D","E","F","G","H","J","K","L","M","N","P","Q","R","T","U","V","W","X","Y","Z"]
   
4.     list2 = []
   
5.     i = 0
   
6.     while i<12:
   
7.         i+=1
   
8.         list2.append(list1[randint(0,27)])
   
9.     print(''.join(list2))
   
10. password()

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莫凭栏

int和str两种不同类型的数据不能相互加减乘除啊

timeislife

莫凭栏 发表于 2017-10-9 10:50
int和str两种不同类型的数据不能相互加减乘除啊

我知道但是int类型根本不存在列表里

xindong

''.join(list2) 只是对字符串列表有效吧。   你的list2是int类型列表

新手·ing

存到列表中后就是int了

timeislife

新手·ing 发表于 2017-10-9 19:14
存到列表中后就是int了

为什么呢

新手·ing

timeislife 发表于 2017-10-10 09:27
为什么呢

愚蠢。

mass

sum()函数的操作对象必须是数字，不能是字符串

mass

你需要的代码或许可以这样写

1. from random import randint
   
2. def password():
   
3.     list1 = ["3","4","6","7","8","9","A","B","C","D","E","F","G","H","J","K","L","M","N","P","Q","R","T","U","V","W","X","Y","Z"]
   
4.     str1 = ''
   
5.     i = 0
   
6.     while i<12:
   
7.         i+=1
   
8.         str1 = str1 + list1[randint(0,28)]
   
9.     print(str1)
   
10.    
    
11. password()
    

复制代码

天黑收衣服

timeislife 发表于 2017-10-9 12:02
我知道但是int类型根本不存在列表里

TypeError: sum() can't sum strings [use ''.join(seq) instead
测试之后可得知字符串不能求和
这边Shell同時也建议用join取代sum
如版主所改写的部分
print(''.join(list2))
最后返回到password()列表就会变int打印出来了