I suspect this is due to an intricacy of Cython. Despite using relative imports, Cython expects the Criterion instance to come from a package called sklearn, not called sklearn1.
On 5 September 2017 at 12:42, hanzi mao <hz...@hotmail.com> wrote: > Hi, > > I am researching on the source code of DecisionTree recently. Here are the > things I tried. > > > 1. Downloaded source code from github. > 2. run "python setup.py build_ext --inplace" to compile the sources in > the unzipped source folder. > 3. Try the following codes to see whether it works. Here I changed the > name of the sklearn folder to sklearn1 to differentiate it from the one > installed. > > > >>> from sklearn1 import tree > > >>> from sklearn.datasets import load_iris > > >>> iris = load_iris() > > >>> clf = tree.DecisionTreeClassifier() > > >>> clf = clf.fit(iris.data, iris.target) > > Traceback (most recent call last): > > File "<stdin>", line 1, in <module> > > File "sklearn1\tree\tree.py", line 790, in fit > > X_idx_sorted=X_idx_sorted) > > File "sklearn1\tree\tree.py", line 341, in fit > > self.presort) > > TypeError: Argument 'criterion' has incorrect type (expected > sklearn.tree._criterion.Criterion, got sklearn.tree._criterion.Gini) > > Then a weird error happened. Actually I also tried the newest stable > version of scikit-learn earlier today. It had the same error. So I was > thinking maybe try the newest version in github might help. Unlikely, it > didn't. > > I have limited knowledge about the source code of scikit-learn. I am > wondering if anyone could help me with this. > > Thanks! > > Best, > Hanna > > > > _______________________________________________ > scikit-learn mailing list > scikit-learn@python.org > https://mail.python.org/mailman/listinfo/scikit-learn > >
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