magic-methods
What is the __dict__.__dict__ attribute of a Python class?
>>> class A(object): pass … >>> A.__dict__ <dictproxy object at 0x173ef30> >>> A.__dict__.__dict__ Traceback (most recent call last): File "<string>", line 1, in <fragment> AttributeError: 'dictproxy' object has no attribute '__dict__' >>> A.__dict__.copy() {'__dict__': <attribute '__dict__' of 'A' objects> … } >>> A.__dict__['__dict__'] <attribute '__dict__' of 'A' objects> # What is this object? If I … Read more
Why does Python use ‘magic methods’?
I’ve been playing around with Python recently, and one thing I’m finding a bit odd is the extensive use of ‘magic methods’, e.g. to make its length available, an object implements a method, def __len__(self), and then it is called when you write len(obj).
Making a python user-defined class sortable, hashable
What methods need to be overridden/implemented when making user-defined classes sortable and/or hashable in python?
Python __call__ special method practical example
I know that __call__ method in a class is triggered when the instance of a class is called. However, I have no idea when I can use this special method, because one can simply create a new method and perform the same operation done in __call__ method and instead of calling the instance, you can call the method.