[FIXED] How can I change a variable in a child class so that its dependent variables can also be changed?

Issue

Does anyone know if it is even possible to change the inherited variables of the parent class by changing a variable in a child class? Without declaring them in the __init__ child?

class Foo(object):
    def __init__(self):
        self.data = "abc"
        self.data_2 = self.data

class Bar(Foo):
    def __init__(self):
        super(Bar, self).__init__()
        self.data = "def"

f = Foo()
b = Bar()

print(f.data_2)  # --> abc
print(b.data_2)  # --> abc

But I expect to get:

print(f.data_2)  # --> abc
print(b.data_2)  # --> def

Solution

this solves the issue if you don't want to accept data as an argument to your init func as someone pointed out above

class Foo(object):
    def __init__(self):
        self.data = "abc"

    @property
    def data_2(self):
        return self.data

class Bar(Foo):
    def __init__(self):
        super(Bar, self).__init__()
        self.data = "def"

f = Foo()
b = Bar()

print(f.data_2)
print(b.data_2)

Answered By - Sassy

Answer Checked By - Cary Denson (PHPFixing Admin)