CODEWITHSUNDEEP
pythonpython-3.x
Doc
Doc

Reputation: 41

Getting an attribute from a child class - is this possible?

Is it possible to get the attribute of a child class in Python 3?

This doesn't work:

class Foo:
    def __init__(self):
        print(vars(self))


class Bar(Foo):
    example_attribute = "baz"


test = Bar()
# prints {}
# I want it to print {"example_attribute": "baz"}

Upvotes: 2

Views: 48

Answers (2)

Data_Is_Everything
Data_Is_Everything

Reputation: 2016

Something like the answer above but with a main to execute an instance of Bar()

class Foo:
    def __init__(self):
        print(vars(self.__class__))

class Bar(Foo):
    example_attribute = "baz"

if __name__ == "__main__":
    test = Bar()

Upvotes: 0

Jean-François Fabre
Jean-François Fabre

Reputation: 140148

your attribute is a class attribute. You can get it with:

class Foo:
    def __init__(self):
        print(vars(self.__class__))

result:

{'__module__': '__main__', 'example_attribute': 'baz', '__doc__': None}

if the attribute was an instance attribute, you would have to call the parent __init__ after you have defined it. Something like:

class Foo:
    def __init__(self):
        print(vars(self))

class Bar(Foo):
    def __init__(self):
        self.example_attribute = "baz"
        Foo.__init__(self)

Upvotes: 3

Related Questions