Why child class doesn't overwerite the fields from based class in python and how deal with that

Question

I create based abstract class in python which is based class for all child classes and implement some functions which will be redundant to write each time in every child class.

class Element:

    ###SITE###
    __sitedefs = [None]

    def getSitedefs(self):
        return self.__sitedefs


class SRL16(Element):

    ###SITE###
    __sitedefs = ['SLICEM']

Ther result is logical in on hand beacuse I get the value from the based class where I declare the value but otherwise I overwite it in child one. My question is how to get from

srl = SRL16()
srl.getSitedefs()

SLICEM not NONE

Probably I missunderstending something very based but please help.

Best regards

score 7 · Accepted Answer · edited May 23 '17 at 11:57

7

Your problem's is due to name mangling. See eg: What is the meaning of a single- and a double-underscore before an object name?.

If you change all the __sitedefs by _sitedefs then everything should work as expected.

edited May 23 '17 at 11:57

Community

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answered Oct 10 '13 at 14:57

hivert

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Indeed, this is the entire purpose of the double-leading underscore. – Daniel Roseman Oct 10 '13 at 14:57

Why child class doesn't overwerite the fields from based class in python and how deal with that

1 Answers1