解决Python中字典出现“TypeError: 'dict_keys' object does not support indexing”错误

“TypeError: 'dict_keys' object does not support indexing”错误,是因为python3以后的版本改变了dict.keys的返回值,返回的是dict_keys对象,不支持索引值。

#!/usr/bin/env python
# -*- coding:utf-8 -*-

list_of_trees = {'no surfacing': 'a','no surfacings': 'b'}

lst = list_of_trees.keys()
print(lst[0])

出现如下错误:很明显,错误提示类型错误,dict_keys对象不支持索引值。

为了解决这样的问题,我们可以将返回对象强制转换为list对象,代码如下修改:

#!/usr/bin/env python
# -*- coding:utf-8 -*-

list_of_trees = {'no surfacing': 'a','no surfacings': 'b'}

lst = list(list_of_trees.keys())
print(lst[0])

运行结果为:

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