How to create constants in Python?

Question

Why there are no constants in python?

Answer 1

you cannot declare a variable constant in python,
but it is possible to create a property that has a "getter function" to read and manipulate the data, but no "setter function" to re-write and change the data. This will prevent the identifier from being changed.

Answer 2

You can also define a constant inside a tupel, which can not be changed.

pi = (3.14159)

Answer 3

Sebastian Keßler
Well, this is not a tuple. Then, you can not modify a variable inside a tuple, but you can redefine the tuple itself. So, your solution is not working.

Answer 4

Alihuseyn Kengerli
There is no way to declare a constant in python. Even declaring a private attribute or method of a class is more a convention then a statement.
But there is a "hack" that allowed you to make a kind of a constant as described here:
http://code.activestate.com/recipes/65207-constants-in-python/?in=user-97991