Constants in Python

• use all caps to represent constants (there is no rlly any way, so it’s more like convention)

PI = 3.14159
MAX_NUM = 100

• if you want actual enforcement (at least during development) you can use the Final type hint from the typing module

from typing import Final
 
MAX_SPEED: Final[int] = 120
# This runs, but your editor will underline it in red
MAX_SPEED = 200

• the editor will scream error when u change the constant only when ur using the typing module

• If you are writing scripts or simple apps, just use ALL_CAPS. If you are working on a large, professional codebase, use Final