self

[Vojin Jovanovic]

> Why such a
> harsh reaction without bothering to correct the obvious 'typo'?

No, it is not the 'typo'.  I corrected that immediately.
Also you had in your message >>> e=Evaluator({'a':'3']), a wrong bracket.
Go back to your post and check it out.  That is why I thought that you
didn't test it.
However,  all that aside, the problems is that your code just din't work
after I corrected those 2 'typos'.  Take a look yourself ....

Python 2.1.2 (#31, Jan 15 2002, 17:28:11) [MSC 32 bit (Intel)] on win32
Type "copyright", "credits" or "license" for more information.
IDLE 0.8 -- press F1 for help
>>> class Evaluator:
    def __init__(self, eqs={}):
        self.__dict__['equations']=eqs
    def __getattr__(self, name):
        value = self.equations[name]
        if type(value)!=str:
            return value   # if it's not a string, just give it back
        scope={}
        while 1:
            try:
                return eval(value, scope)
            except NameError, n:
                var=str(n).split("'")[1]
                scope[var]=getattr(self, var)
    def __setattr__(self, name, value):
        self.equations[name]=value


>>> class Berta:
    a=5


>>> e=Evaluator({'a':3})
>>> e.berta=Berta()
>>> e.g='berta.a*a'
>>> e.g
'berta.a*a'
>>>


V.J.