Python Naming Conventions That Win Marks

The Four Rules

• Variables and functions — snake_case.
• Classes — PascalCase.
• Constants — ALL_CAPS.
• Private — start with _.

Names That Describe Intent

# Bad
d = 86400        # seconds in a day?
x = get(u)

# Good
SECONDS_PER_DAY = 86400
user = get_user_by_id(user_id)

Avoid Abbreviations

• num_students beats nstu.
• total_price beats tp.

Loop Counters Are OK Short

i, j, k are fine for numeric loops. For list iteration, prefer for student in students.