Most of this is from PEP-8

• Indent using four spaces

• You can use extra indents to align arguments; then no arguments on 1st line

  Aligned with opening delimiter

  foo = long_function_name(var_one, var_two, var_three, var_four)

  More indentation included to distinguish this from the rest.

  def long_function_name( var_one, var_two, var_three, var_four): print(var_one)

• 2 blank lines before top-level function and class definitions

• UTF-8

• Space around assignment and comparison operators

• No space on argument default assignment

• Docstrings should end with triple double quote on a line by itself

• See PEP 257 for docstring conventions

• Imports at top of file: standard, then related, then local. Separate by groups by blank lines.
• Imports on separate lines
• Avoid wildcard imports; no from XX import *

• Package and module names: short_underscores
• Class names: CapWords
• Exception names: CapWordError (suffix with Error)
• Function names: the_date
• Private methods: _the_date
• Constants: ALL_CAPS

You can run your program with python <filename.py>. Use python -i <filename.py> to run the program and then return to the interactive Python prompt.

To run your program just by typing the name, put this line at the top of the main program: #!/usr/bin/env python or #!/usr/bin/env python3, and then set the file permissions to be executable with chmod u+x <filename>.py (for the user) or chmod +x <filename>.py for all.