[mypy] Fix `matrix_operation.py` (#5808)

* Update matrix_operation.py

* Update mypy.ini

* Update DIRECTORY.md

* formatting

* Update matrix_operation.py

* doctest for exception

* A bit more...

Rohan R Bharadwaj committed 4y ago

e9882e41ba7a1d1fbdc12362a522a1b646497192

Parent: d6a1623

Committed by GitHub <noreply@github.com> on 11/10/2021, 3:22:52 PM