cleaning up the code using pylint and flake8 and bandit

I realized with so much Python, there's a need to clean up the code.
https://www.youtube.com/watch?v=G1lDk_WKXvY
In this post I document a few software tools I used.

Pylint

$ pylint interactive_user_prompt.py --disable bad-whitespace,missing-docstring,superfluous-parens,bad-indentation,line-too-long,trailing-whitespace,len-as-condition,too-many-locals,invalid-name,too-many-branches,too-many-return-statements,too-many-statements --reports=n

and flake8

$ flake8 --ignore=E111,E225,E231,E501,E226,W291,E221,E115,E201,W293,E261,E302,E265 interactive_user_prompt.py

Not surprisingly, some of my functions are complicated (a score of greater than 10 is frowned upon)
$ python -m mccabe --min 9 interactive_user_prompt.py | wc -l
      15
$ python -m mccabe --min 15 interactive_user_prompt.py | wc -l
       4
So 15 functions scored 9 or greater; 4 functions were 15 or higher!

That's out of 50 functions and 1946 lines of Python (including comments and blank lines) $ cat interactive_user_prompt.py | wc -l

    1946

$ cat interactive_user_prompt.py | grep "^def " | wc -l

      50

Although I'm not concerned about security of a locally run Python script, I also tried bandit:
$ bandit -r interactive_user_prompt.py
which complained about my use of the shell.

I'm aware of autopep8 but haven't used it yet.