But the main advantage comes with multiple inheritance, where all sorts of fun stuff can happen. In fact, multiple inheritance is the only case where super() is of any use I would not recommend using it with classes using linear inheritance, where it's just useless overhead. The one with super has greater flexibility The call chain for the methods can be intercepted and functionality injected. As for chaining super::super, as i mentionned in the question, i have still to find an interesting use to that
For now, i only see it as a hack, but it was worth mentioning, if only for the differences with java (where you can't chain super). I'm currently learning about class inheritance in my java course and i don't understand when to use the super() call I found this example of code where super.variable is used 'super' object has no attribute '__sklearn_tags__' This occurs when i invoke the fit method on the randomizedsearchcv object I attempted to tune the hyperparameters of an xgbregressor.
Extends e>) says that it's some type which is a subclass of e (in both cases e itself is okay.) so the constructor uses the Extends e form so it guarantees that when it fetches values from the collection, they will all be e or some subclass (i.e The only workaround i found is to declare all members final yourself and use the @data annotation instead Those subclasses need to be annotated by @equalsandhashcode and need an explicit all args constructor as lombok doesn't know how to create one using the all args one of the super class: If you add any other column/attribute to a primary key then it become a super key, like employeeid + fullname is a super key
If a table don't have any individual columns that qualifies for a candidate key, then you have to select 2 or more columns to make a row unique. I wrote the following code When i try to run it as at the end of the file i get this stacktrace 'super' object has no attribute do_something class parent
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