Question

我在Windows10上使用IPython来训练和绘制决策树。我知道以下代码在linux上运行了一段时间。我安装了pydot并且还有graphviz（正确指定了路径）。

# Train and draw out a decision tree

from IPython import display
from sklearn import datasets, tree, utils
from sklearn.externals.six import StringIO  
import pydot 

# Train a small decision tree on the iris dataset
dataset = datasets.load_iris()
X_iris, y_iris = utils.shuffle(dataset.data, dataset.target,random_state=42)
tree_clf = tree.DecisionTreeClassifier(max_depth=3).fit(X_iris, y_iris)

# Generate a plot of the decision tree
dot_data = StringIO() 
tree.export_graphviz(tree_clf, out_file=dot_data) 
graph = pydot.graph_from_dot_data(dot_data.getvalue()) 
display.Image(graph.create_png())

我收到以下错误：

---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
<ipython-input-5-3452aa5e9794> in <module>()
     15 tree.export_graphviz(tree_clf, out_file=dot_data)
     16 graph = pydot.graph_from_dot_data(dot_data.getvalue())
---> 17 display.Image(graph.create_png())

AttributeError: 'list' object has no attribute 'create_png'

Answer 1

我通过将所有pydot命令更改为pydotplus来解决了这个问题。（包括import pydotplus）可以使用!pip install pydotplus来安装pydotplus包。

参考 https://github.com/scikit-learn/scikit-learn/pull/7342/files

使用Pydot创建图表的属性错误

1 个答案: