Jupyter Notebook下graphviz报错 Error: ＜stdin＞: syntax error in line 1 near ‘None‘

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报错代码：

feature_name = ['酒精','苹果酸','灰','灰的碱性','镁','总酚','类黄酮','非黄烷类酚类','花青素','颜色强度','色调','od280/od315稀释葡萄酒','脯氨酸']import graphviz
dot_data = tree.export_graphviz(clf,out_file= "Tree.dot"
#                                 ,out_file= None,feature_names = feature_name,class_names=["琴酒","雪莉","贝尔摩德"],filled=True,rounded=True) 
#不知道为啥会报错
graph = graphviz.Source(dot_data)
grap

报错信息：
在这里插入图片描述
CalledProcessError: Command ‘[‘dot.bat’, ‘-Kdot’, ‘-Tsvg’]’ returned non-zero exit status 1. [stderr: b"Error: : syntax error in line 1 near ‘None’\r\n"]

<graphviz.files.Source at 0x197ab6e2198>

改正：
在参数列表添加 out_file=None，报错解决

import graphviz
dot_data = tree.export_graphviz(clf
#                                 ,out_file= "Tree.dot",out_file= None,feature_names = feature_name,class_names=["琴酒","雪莉","贝尔摩德"],filled=True,rounded=True) 
graph = graphviz.Source(dot_data)
graph