494 I have a script named test1.py which is not in a module. It just has code that should execute when the script itself is run. There are no functions, classes, methods, etc. I have another …

In your example, Third() will call First.__init__. Python looks for each attribute in the class's parents as they are listed left to right. In this case, we are looking for __init__. So, if you define …

52 This is inspired by a question I just saw, "Change what is returned by calling class instance", but was quickly answered with __repr__ (and accepted, so the questioner did not actually …

method is now an actual function object. that you can call directly (functions are first class objects in python just like in PHP > 5.3) . But the considerations from below still apply.

IMHO: object oriented programming in Python sucks quite a lot. The method dispatching is not very straightforward, you need to know about bound/unbound instance/class (and static!) …

Because of the way diamond inheritance works in python, classes whose base class is object should not call super().__init__(). As you've noticed, doing so would break multiple inheritance …

The reason you need to use self is because Python does not use special syntax to refer to instance attributes. Python decided to do methods in a way that makes the instance to which …

Return the sub-class/sub-classes as a dictionary/list so code calling the _subclass_container function can access the sub-classes inside. In the __init__ function inside the higher level …

How do I declare custom exception classes in modern Python? My primary goal is to follow whatever standard other exception classes have, so that (for instance) any extra string I …

Apr 29, 2011 · Here's an example of where __call__ is used in practice: in pytorch, when defining a neural network (call it class MyNN(nn.Module) for example) as a subclass of …