CODEWITHSUNDEEP
pythonclass
Mike Dergance
Mike Dergance

Reputation: 63

Object init attributes not accessible in downstream classes

I'm having issues with accessing object attributes when those objects are passed into new classes.

example:

    class foo:
        def __init__(self, x):
            self.x = x

    class bar: 
        def __init__(self, foo: foo, y):
            self.foo = foo, 
            self.y = y

    class why: 
        def __init__(self, bar: bar, z):
            self.bar = bar
            self.z = z

    a = foo(1)
    b = bar(a, 2)
    c = why(b, 3)

When I try to access b.foo.x i get an AttributeError: 'tuple' object has no attribute 'x'

but when I try to access c.bar.y I successfully have 2 returned. Why can I access the y attribute of the barclass from the why class, but I can't access the x attribute of the foo class from the bar class?

I have a series of custom objects that are being passed into custom classes - what is the appropriate way to accomplish this?

There is also a weird case where when I run <parent_object>.<child_object>.__dict__.keys() I see all of the methods of the <child_object>, but not of the attributes assigned during the __init__ phase.

Thanks in advance!

Upvotes: 0

Views: 110

Answers (1)

chang_trenton
chang_trenton

Reputation: 915

You have a simple typo — the comment at the end of self.foo = foo, makes self.foo a tuple. Remove the comma, and it will work.

Upvotes: 1

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