Fixed LGTM and typehint (#3970)

* fixed LGTM
fixed typehint

* updating DIRECTORY.md

* Update lucas_series.py

* Update lucas_series.py

Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>
Co-authored-by: John Law <johnlaw.po@gmail.com>

Du Yuanchao committed 5y ago

bfb0c3533d88f82c18f7ae792b2d2e154b9b51c7

Parent: 8cafadd

Committed by GitHub <noreply@github.com> on 11/28/2020, 2:42:30 PM