The basic workflow.
THE SEQUENCE
Write code in a file with a .py extension Save it Run it from a terminal Read the output or the error
HOW TO RUN IT
From a terminal, invoke Python followed by the filename.
WHAT HAPPENS
The file is executed from top to bottom.
WHAT AN ERROR LOOKS LIKE
A traceback: several lines ending with the error type and message.
Read it from the bottom. The last line states what went wrong.
WHAT TO DO FIRST
Write something that prints a message, and run it.
That proves the installation works.
WHAT TO DO NEXT
Add a variable, then a condition, then a loop.
Small steps, each run and verified.
WHAT NOT TO DO
Write fifty lines before running anything.
WHY
When it fails you will not know which part.
WHAT TO BUILD AS A HABIT
Run frequently. Test small pieces.
WHAT TO KEEP
Your early scripts. They become useful references.
