你特征的名字是x的变量，即为data的前两列。最后一行，改为: export_graphviz(dtc, feature_names=data.columns[:3], out_file=f)。

这也不行啊，还是报错。
Traceback (most recent call last):
  File "D:/lxz/5-2.py", line 17, in <module>
    f = export_graphviz(dtc,feature_names=data.columns[:3],out_file = f)
  File "D:\Anaconda\lib\site-packages\sklearn\tree\export.py", line 403, in export_graphviz
    recurse(decision_tree.tree_, 0, criterion=decision_tree.criterion)
  File "D:\Anaconda\lib\site-packages\sklearn\tree\export.py", line 302, in recurse
    node_to_str(tree, node_id, criterion)))
UnicodeEncodeError: 'ascii' codec can't encode characters in position 10-13: ordinal not in range(128)

这也不行啊，还是报错。
Traceback (most recent call last):
  File "D:/lxz/5-2.py", line 17, in <module>
    f = export_graphviz(dtc,feature_names=data.columns[:3],out_file = f)
  File "D:\Anaconda\lib\site-packages\sklearn\tree\export.py", line 403, in export_graphviz
    recurse(decision_tree.tree_, 0, criterion=decision_tree.criterion)
  File "D:\Anaconda\lib\site-packages\sklearn\tree\export.py", line 302, in recurse
    node_to_str(tree, node_id, criterion)))
UnicodeEncodeError: 'ascii' codec can't encode characters in position 10-13: ordinal not in range(128)

这样给你讲，太麻烦了，你把读取的数据集和代码发我邮箱：lgb453476610@163.com。我给你调一下看能调好不。

为啥不贴源代码文本