how to set global const variables in python

Question

I am building a solution with various classes and functions all of which need access to some global consants to be able to work appropriately. As there is no const

Answer 1

General convention is to define variables with capital and underscores and not change it. Like,

GRAVITY = 9.8

However, it is possible to create constants in Python using namedtuple

import collections

Const = collections.namedtuple('Const', 'gravity pi')
const = Const(9.8, 3.14)

print(const.gravity) # => 9.8
# try to change, it gives error
const.gravity = 9.0 # => AttributeError: can't set attribute

For namedtuple, refer to docs here