Outside GIL, you can't really work easily with Python objects. You should instead stick to local C variables and routines. For instance, instead of numpy routines, you can use cmath routines.
The cython book ( https://www.amazon.com/Cython-Programmers-Kurt-W-Smith/dp/1491901551) and Nicolas's post (http://nicolas-hug.com/blog/cython_notes) may give you some hints. On Thu, Jan 9, 2020 at 7:24 AM aditya aggarwal < adityaselfeffici...@gmail.com> wrote: > Hello > > I'm trying to change the entropy function which is used in sklearn for > DecisionTreeClassification locally on my system. > when I rerun the pip install --editable . command after updating the > cython file, I receive the following error message: > > Error compiling Cython file: > ------------------------------------------------------------ > ... > for k in range(self.n_outputs): > for c in range(n_classes[k]): > count_k = sum_total[c] > if count_k > 0.0: > count_k /= self.weighted_n_node_samples > entropy -= count_k * np.log2(count_k) > ^ > ------------------------------------------------------------ > > sklearn/tree/_criterion.pyx:537:20: Coercion from Python not allowed > without the GIL > > This error is persisten with other errors as: > > Operation not allowed without gil > Converting to Python object not allowed without gil > Converting to Python object not allowed without gil > Calling gil-requiring function not allowed without gil > Accessing Python attribute not allowed without gil > Accessing Python global or builtin not allowed without gil > > > I've tried looking up for solution on various sites, but could not resolve > the issue. > Any help would be appreciated. > > Thanks and regards > Aditya Aggarwal > _______________________________________________ > scikit-learn mailing list > scikit-learn@python.org > https://mail.python.org/mailman/listinfo/scikit-learn >
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