Add Type Annotations Hints

[wontonswaggie]

Type annotations hints should be added to the method definitions as well as python docs.

Use this as a reference: https://docs.python.org/3/library/typing.html

[AnshumaJain]

@wontonswaggie, I am GHC OSD participant. I wanted to work on this issue.

[hamidakhatri]

@wontonswaggie, I am a GHC Student Scholar and an OSD participant. I am new to Python, have taken a course at AlbanyCanCode and CodePath. I would love to work on this issue with you. Please, let me know what the steps would be. Thank you.

[Parul-0107]

Hey everyone, I am a GHC Student Scholar as well as an OSD participant. I would like to know if this group could use one more person.

[jyotsna-priya]

Hi everyone, I am interested in working on this issue. Is it possible to join this group? Thank you