'class' named tuple

Emmanuel Mayssat emayssat at gmail.com
Wed Feb 1 01:54:14 CET 2012


I have the following program.
I am trying to have index the attributes of an object using __getitem__.
Reading them this way works great, but assigning them a value doesn't
Is there a way to do such a thing?
(Almost like a named tuple, but with custom methods)

class LIter(object):
    def __init__(self,parent=None):
        super(LIter, self).__init__()
        self.toto = 3
        self.tata = 'terto'

    def __getitem__(self,index):
        if index == 0 : return self.toto
        if index == 1 : return self.tata

   # [other methods]



if __name__ == "__main__":
    i = LIter()
    print i[0]
    print i[1]
    i.toto = 2
    i.tata = 'bye'
    print i[0]
    print i[1]
    i[0] = -1
    i[1] = 'salut'
    print i[0]
    print i[1]





$ python iter.py
3
terto
2
bye
Traceback (most recent call last):
  File "iter.py", line 25, in <module>
    i[0] = -1
TypeError: 'LIter' object does not support item assignment



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