Here's a simple class created declaratively:And here's a similar class, but it was defined by invoking the metaclass manually:
In the mathematical sense, a set (or type) is closed under an operation if the operation always returns a member of the set itself.
I want to create, in Python 3, a class MyClass where bool(MyClass) returns False. Is it possible?I want this behavior with the class itself, not objects of that class. For objects of that class I know that I can just return False in __bool__(self).