from dataclasses import dataclass
: Prevents the dynamic addition of any new attributes outside those listed in __slots__ . It can also break multiple inheritance architectures if not handled carefully. 7. Metaclasses: The Code that Writes Code
def get_balance(self): return self.__balance python 3 deep dive part 4 oop
def greet(self): return f"Hello, self.name!"
# Without __slots__ class SlowPoint: def __init__(self, x, y): self.x = x self.y = y from dataclasses import dataclass : Prevents the dynamic
Prefixing an attribute with two underscores ( __attribute ) triggers name mangling. Python changes the internal name to _ClassName__attribute to prevent accidental overrides in subclasses. Programmatic Getters and Setters
Do you need to see real-world examples from libraries like or Django ? Share public link Share public link A creates classes
A creates classes. Just as a class creates instances, type (the default metaclass) creates class objects.
def drive(self): self.engine.start() for w in self.wheels: w.rotate()
The super() function does not simply look up the parent class; it looks up the next class listed in the current object's MRO .
class Animal(ABC): @abstractmethod def speak(self) -> str: """Every animal must implement speak.""" pass