Format code with yapf, black, autopep8 and isort

This commit fixes the style issues introduced in f2a7b15 according to the output
from yapf, black, autopep8 and isort.

Details: https://deepsource.io/gh/dpr1005/Semisupervised-learning-and-instance-selection-methods/transform/883be9e3-48ae-4be1-b1b9-23d8f4f28e8f/

Author: deepsource-autofix[bot]

semisupervised/TriTraining.py

@@ -196,8 +196,7 @@ def fit(self, samples, y):
             ):
                 break
 
-    def _check_for_update(self, e_j, ep_j, h_j, l_j,
-                          labeled, lp_j, update_j, y):
+    def _check_for_update(self, e_j, ep_j, h_j, l_j, labeled, lp_j, update_j, y):
         """
         If the update_j flag is True, then we concatenate the labeled data with
         the new data, and fit the model to the new data