Constants in Python is a Scripts software developed by Alex Martelli. After our trial and test, the software is proved to be official, secure and free. Here is the official description for Constants in Python:

In Python, any variable can be re-bound at will -- and modules don't let you define special methods such as an instance's __setattr__ to stop attribute re-binding. Easy solution (in Python 2.1 and up): use an instance as "module".