When you write a small Python script, the best debugging habit is to make failure obvious. Print intermediate values, keep functions small, and test one change at a time.

Practical habits

• Start with a tiny version of the script.
• Add one feature at a time.
• Read the traceback before changing anything.

Why this works

Small programs are easier to inspect, and the cause of a bug is usually much clearer when you reduce the amount of code involved.