xgboost plot_tree（model）-运行时修复TypeError：super（type，obj）

Question

运行代码时：

plot_tree(model)

我得到如下错误。

我该如何解决？

我怀疑这可能是安装graphviz软件包的问题，​​为此，我做了以下事情：

• 从以下位置安装Windows软件包 （https://graphviz.gitlab.io/_pages/Download/Download_windows.html)Install python graphviz软件包（使用anaconda提示“ pip install graphviz）

• 安装python graphviz软件包（使用anaconda提示“ pip install graphviz）

• 将C：\ Program Files（x86）\ Graphviz2.38 \ bin添加到用户路径
• 将C：\ Program Files（x86）\ Graphviz2.38 \ bin \ dot.exe添加到系统路径

错误：

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Traceback (most recent call last):
File “”, line 1, in
plot_tree(model)
File “C:\ProgramData\Anaconda3\lib\site-packages\xgboost\plotting.py”, line 278, in plot_tree
rankdir=rankdir, **kwargs)
File “C:\ProgramData\Anaconda3\lib\site-packages\xgboost\plotting.py”, line 227, in to_graphviz
graph = Digraph(graph_attr=kwargs)
File “C:\ProgramData\Anaconda3\lib\site-packages\graphviz\dot.py”, line 61, in __init__
super(Dot, self).__init__(filename, directory, format, engine, encoding)
TypeError: super(type, obj): obj must be an instance or subtype of type
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