Python 3 Deep Dive Part 4 Oop High Quality !!top!!

class Order: quantity = PositiveNumber() price = PositiveNumber()

To understand OOP in Python, you must first understand what an "object" actually is in the CPython implementation. python 3 deep dive part 4 oop high quality

Enforcing coding standards or registering classes automatically upon definition (e.g., a Plugin system). a Plugin system).