isort --profile black . (#2181)

* updating DIRECTORY.md

* isort --profile black .

* Black after

* updating DIRECTORY.md

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matrix/tests/test_matrix_operation.py

@@ -6,11 +6,13 @@ the pytest run configuration
 -vv -m mat_ops -p no:cacheprovider
 """
 
+import logging
+
 # standard libraries
 import sys
+
 import numpy as np
 import pytest
-import logging
 
 # Custom/local libraries
 from matrix import matrix_operation as matop