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@kuoe0 kuoe0/constant.py
Created Aug 13, 2013

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# 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__
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