super()

08/24/2023

• Python super()
• The super() function is used to give access to methods and properties of a parent or sibling class.
• The super() function returns an object that represents the parent class.

    class Foo:
        def __init__(self):
            self.foo = "foo"
            
        def _print_self_foo(self):
            print(self.foo)

        def _print_foo(self):
            print("foo")


    class Bar(Foo):
        def __init__(self):
            pass
        
        def print_foo(self):
            super()._print_foo()
            self._print_foo()
            
        def print_self_foo(self):
            self._print_self_foo()
        
        def print_self_foo_after_inheritance(self):
            super().__init__()
            self._print_self_foo()


    if __name__ == "__main__":
        import traceback
        
        bar = Bar()
        bar.print_foo()
        # > foo
        # > foo
        
        try:
            bar.print_self_foo()
        except Exception as e:
            traceback.print_exc()
            # > AttributeError: 'Bar' object has no attribute 'foo'
        
        bar.print_self_foo_after_inheritance()
        # > foo

• print_self_foo() method of Bar occurs AttributeError because Foo.__init__() method wasn't called
• super().__init__() is basically called in the child class's __init__()

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