Supplying deep copied attributes from a module. Following python code expect to be placed like app/consts/__init__.py. Then you can place app/consts/constant_values.py having constant values, and get deep copied values.

__init__.py

import copy

class AttributeSupplier(object):
    def __init__(self, *args):
        self.consts_module = __import__(*args)

    def __getattr__(self, name):
        return copy.deepcopy(getattr(self.consts_module, name))

consts = AttributeSupplier('constant_values', globals(), locals(), ['app', 'consts'])