AttributeError:“list”对象没有属性“write\u pdf”

Question

我开始学习机器学习。我正在遵循一个google教程，但是我面对这个错误，我发现的答案在我的代码中不起作用。我不确定，但Python版本似乎已经改变，不再使用某些库了。在

这是错误：

[0 1 2]
[0 1 2]

Warning (from warnings module):
  File "C:\Users\Moi\AppData\Local\Programs\Python\Python37-32\lib\site-packages\sklearn\externals\six.py", line 31
    "(https://pypi.org/project/six/).", DeprecationWarning)
DeprecationWarning: The module is deprecated in version 0.21 and will be removed in version 0.23 since we've dropped support for Python 2.7. Please rely on the official version of six (https://pypi.org/project/six/).
Traceback (most recent call last):
  File "C:\Users\Moi\Desktop\python\ML\decision tree.py", line 30, in <module>
    graph.write_pdf("iris.pdf")
AttributeError: 'list' object has no attribute 'write_pdf'

代码如下：

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Answer 1

graph_from_dot_data返回一个元组，必须分解它才能得到图形。在

更改：

graph = pydot.graph_from_dot_data(dot_data.getvalue())
graph.write_pdf("iris.pdf")

收件人：

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贷方：https://www.programcreek.com/python/example/84621/pydot.graph_from_dot_data