This repository contains examples of how to define constants in Python without mypy.
Python is a dynamically typed language, which means that the type of a variable is determined at runtime. This means that you can change the type of a variable at any time. However, there are some values that are constant which means they cannot be changed.
PI = 3.14Usually, constants are written in uppercase letters. But, in this way, you can still change the value of the constant.
from typing import Final
PI: Final[int] = 3.14
PI = "OVERWRITTEN" # This will raise an errorHowever, sometimes we can not use mypy because of organizational reasons. We introduce another way to define constants in Python.
You can run the following command to see the output:
python reassign_class.py
# uv run reassign_class.py, just class
python reassign_dataclass.py
# uv run reassign_dataclass.py, just dataclass
python reassign_enum.py
# uv run reassign_enum.py, just enum
python reassign_slots.py
# uv run reassign_slots.py, just slotsThis repository is under the MIT License.
Feel free to contribute to this repository. For example, you can add new examples or improve the existing ones. Just open a pull request and I will review it as soon as possible.
Check the code style with the following command:
uv run black .