``` # Put in const.py...: class _const: class ConstError(TypeError):

Question

``` # Put in const.py...: class _const: class ConstError(TypeError):

pass
def __setattr__(self,name,value):
if self.__dict__.has_key(name):
raise self.ConstError, "Can't rebind const(%s)"%name
self.__dict__[name]=value
import sys
sys.modules[__name__]=_const()

# that's all -- now any client-code can
import const
# and bind an attribute ONCE:
const.magic = 23
# but NOT re-bind it:
const.magic = 88 # raises const.ConstError
# you may also want to add the obvious __delattr__
``` Дискуссионная тема, но кто-то юзает подобные костыли, чтобы хоть как-то обезопасить константы?