export_graphviz导不出决策树图

import graphviz
dot_data = tree.export_graphviz(clf,
feature_names= feature_name,
class_names=["琴酒","雪莉","贝尔摩德"],
filled=True,
rounded=True)
graph = graphviz.Source(dot_data)
graph

前面加句指定编码试试

# encoding: utf-8

数据源文件是什么编码？