我正在尝试使用scikit-learn的iris数据集训练决策树。我尝试运行以下命令:
from sklearn.datasets import load_iris
from sklearn import tree
clf = tree.DecisionTreeClassifier()
iris = load_iris()
clf = clf.fit(iris.data, iris.target)
tree.export_graphviz(clf,out_file='tree.dot')
from sklearn.externals.six import StringIO
import pydot
dot_data = StringIO()
tree.export_graphviz(clf, out_file=dot_data)
graph = pydot.graph_from_dot_data(dot_data.getvalue())
我收到以下错误:
TypeError: startswith first arg must be str or a tuple of str, not bytes
有人可以帮我解决这个问题吗。谢谢你
我收到错误的回溯
在()---->中的TypeError Traceback(最近的最后一次调用) 1 graph = pydot.graph_from_dot_data(dot_data.getvalue())
C:\ Users \ Priya \ Anaconda3 \ Lib \ site-packages \ pydot.py in graph_from_dot_data(data)
218“”“ 219
- > 220返回dot_parser.parse_dot_data(data)221 222
parse_dot_data(data)中的C:\ Users \ Priya \ Anaconda3 \ Lib \ site-packages \ dot_parser.py
508 top_graphs = list() 509
- > 510如果data.startswith(codecs.BOM_UTF8):511 data = data.decode('utf-8')512
TypeError:startswith first arg必须是str或str的元组,而不是字节
答案 0 :(得分:0)
@Thomas K
TypeError Traceback (most recent call last)
<ipython-input-12-5394fc84af26> in <module>()
----> 1 graph = pydot.graph_from_dot_data(dot_data.getvalue())
C:\Users\Priya\Anaconda3\Lib\site-packages\pydot.py in graph_from_dot_data(data)
218 """
219
--> 220 return dot_parser.parse_dot_data(data)
221
222
C:\Users\Priya\Anaconda3\Lib\site-packages\dot_parser.py in parse_dot_data(data)
508 top_graphs = list()
509
--> 510 if data.startswith(codecs.BOM_UTF8):
511 data = data.decode( 'utf-8' )
512
TypeError: startswith first arg must be str or a tuple of str, not bytes