How do I pass the initialization data to a parent from the constructor of its child?

AnthropomorphicBeing

I have class B inheriting from class A. How do I pass from the constructor of B, the input for the constructor of A? In the docuementation I only find this, but I'm not clear on it. When I try, writing this:

func _init().(data, movement): it tells me "data" isn't declared in the current scope. So what's the problem? How is it done?

cybereality

I don't believe you can call the constructor of a parent (since that probably already happened before the child was created). However you can call your your own function in the parent by using the dot . operator.

Parent:

func init_data(arg):
   # do something with arg

Child:

func _init():
   var arg = 0
   .init_data(arg)