Python 3 Deep Dive Part 4 Oop High Quality

print(rectangle.area()) # Output: 20 print(circle.area()) # Output: 28.26

High-quality software requires robust encapsulation. Python does not have strict private or protected keywords like Java or C++. Instead, it relies on naming conventions and powerful runtime hooks to manage access to attributes. Public, Protected, and Private Attributes : Accessible from anywhere. python 3 deep dive part 4 oop high quality

Let’s combine __slots__ , property , descriptors, and __init_subclass__ into a small data validation framework: print(rectangle

class InventoryItem: # Descriptors handle the heavy lifting cleanly stock = IntegerField(min_value=0, max_value=1000) price = IntegerField(min_value=1) def __init__(self, name, stock, price): self.name = name self.stock = stock self.price = price Use code with caution. python 3 deep dive part 4 oop high quality