python：TypeError: ‘dict_keys‘ object does not support indexing

 1. 报错：python：TypeError: 'dict_keys' object does not support indexing

 

2. 解决：

https://blog.csdn.net/a070220106/article/details/9089379  TypeError: 'dict_keys' object does not support indexing

https://blog.csdn.net/shuiyixin/article/details/87910896  Python报错：TypeError: 'dict_keys' object does not support indexing（机器学习实战treePlotter代码）解决方案

由于python3改变了dict.keys,返回的是dict_keys对象,支持iterable 但不支持indexable，我们可以将其明确的转化成list：

将以下代码：

 firstStr = inputTree.keys()[0]

改成：

 firstStr = list(inputTree.keys())[0]

即可。