If you fail to follow the rules below for homework scripts, you will lose points.

• The filename of all scripts must have a .py extension
• All scripts must have a comment at the top that briefly describes what the script does
• All comments must use the # symbol
• All scripts must run on the UMB Unix machines without error
• All variable names must be a good description of the values they contain
• Whenever input is needed from the keyboard, a meaningful prompt must be used
• All functions must have a comment that comes before the function header and describes what the function does
• The comment must be immediately above the function header with no blank line between them
• All function definitions must must appear at the top of the script
• The function body must contain no blank lines
• All functions definitions must have a blank line between them
• The code that runs the functions must appear at the bottom of the page after all functions have been defined
• There must be a blank line between the last function definition and the code that runs the function
• All scripts must have the hashbang as their first line with the address /usr/bin/python3
• All scripts must have permissions 755
• Any statement that could cause a runtime error should be placed inside a try/except statement.