added functionality for extracting distinct keywords from list of strings#1

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Viole-Grace wants to merge 6 commits intosahyagiri:mainfrom

Viole-Grace:main

Commits on Feb 21, 2022

Commits on Feb 22, 2022

update -- updated function name as per comment on PR #1
aamir
committed
refactor -- modularized code into pieces in DistinctKeywords class to run separately for a single string and for a list of strings
aamir
committed