jupyter error: can't view decision tree as png in random forest

Question

我正在尝试在 Jupyter Notebook 中查看我的决策树。我已经安装了 graphviz（在 anaconda cmd 提示符下）和 pydot。

#taking one tree from the forest and saving it as an image
#!pip install graphviz
from sklearn.tree import export_graphviz
#!pip install pydot
import pydot 

#pulling out one tree from the forest
tree = rf.estimators_[5]

#export one image to a dot file
feature_list = list(feature.columns)
export_graphviz(tree, out_file = 'tree.dot', feature_names = feature_list, 
           rounded = True, precision = 1)

#use dot file to create a graph
(graph, ) = pydot.graph_from_dot_file('tree.dot')

#write graph to a png file
graph.write_png('tree.png')

最后一行 运行s 成功，没有任何输出。 然后我 运行 anaconda 命令提示符中的代码： dot -Tpng tree.dot -o tree.png 并得到错误： Error: dot: can't open tree.dot1

我正在使用 windows 机器。

Answer 1

图片在我的下载文件夹中可用。