[已解决]关于字典的输出的问题

vallenshao

dict1.fromkeys((1, 2, 3), ('one', 'two', 'three'))
也就是dic1={1: ('one', 'two', 'three'), 2: ('one', 'two', 'three'), 3: ('one', 'two', 'three')}
创建了dict1之后，我想看一下dict[1]会打印什么，但是会报错。

dict2 ={1:'ss', 2:'dd'}
dict2[1] = 'ss'
dict2却可以实现，但是dict1却不行，请问为啥。

最佳答案

月排行榜 / 总排行榜

ba21

2020-2-18 00:03:38

把函数的用法搞清楚

1. >>> dict1={}
   
2. >>> dict1.fromkeys((1, 2, 3), ('one', 'two', 'three'))
   
3. {1: ('one', 'two', 'three'), 2: ('one', 'two', 'three'), 3: ('one', 'two', 'three')}
   
4. >>> dict1
   
5. {}
   
6. >>> dict1 = dict1.fromkeys((1, 2, 3), ('one', 'two', 'three'))
   
7. >>> dict1
   
8. {1: ('one', 'two', 'three'), 2: ('one', 'two', 'three'), 3: ('one', 'two', 'three')}

复制代码

返回值
该方法返回一个新字典。

跳转到最佳答案楼层

ba21

把函数的用法搞清楚

1. >>> dict1={}
   
2. >>> dict1.fromkeys((1, 2, 3), ('one', 'two', 'three'))
   
3. {1: ('one', 'two', 'three'), 2: ('one', 'two', 'three'), 3: ('one', 'two', 'three')}
   
4. >>> dict1
   
5. {}
   
6. >>> dict1 = dict1.fromkeys((1, 2, 3), ('one', 'two', 'three'))
   
7. >>> dict1
   
8. {1: ('one', 'two', 'three'), 2: ('one', 'two', 'three'), 3: ('one', 'two', 'three')}

复制代码

返回值
该方法返回一个新字典。

vallenshao

ba21 发表于 2020-2-18 00:03
把函数的用法搞清楚

谢谢，明白了！