Code Review: Choose three of the programs you’ve written in
this chapter and modify each one to comply with PEP 8:
• Use four spaces for each indentation level. Set your text editor to
insert four spaces every time you press TAB, if you haven’t already
done so (see Appendix B for instructions on how to do this).
• Use less than 80 characters on each line, and set your editor to show a
vertical guideline at the 80th character position.
• Don’t use blank lines excessively in your program files
