Here below you can find the notebook where I tried various classifiers on the textual document named "Twenty User Newsgroups" available in SciKitLearn library. The classifiers are: DecisionTree, SVM, KNN, MultinomialNB and ComplementNB.
https://colab.research.google.com/drive/1WQBvoXw4ZXZ4Kdr1cNd430_iuyjO8xez?usp=sharing