black matrix_operation.py (#2199)

* black matrix_operation.py

* updating DIRECTORY.md

* Update matrix_operation.py

Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>
Co-authored-by: vinayak <itssvinayak@gmail.com>

Christian Clauss committed 5y ago

23cbe4c3528596c365bd0f8a4f5fd780d795ff98

Parent: 749ffd8

Committed by GitHub <noreply@github.com> on 7/14/2020, 8:23:14 AM