Understanding that classes are objects unlocks metaprogramming, factories, and class decorators.
@abstractmethod def validate(self, data): pass
class UserRepository: def save(self, user): ...
print(D.__mro__) # (<class 'D'>, <class 'B'>, <class 'C'>, <class 'A'>, <class 'object'>)
: Python uses the C3 algorithm to determine the order in which it searches for methods in multiple inheritance scenarios. You can inspect this order using the __mro__ attribute. python 3 deep dive part 4 oop high quality
🧠 This is Part 4 of a series. If you haven’t read Parts 1–3 on variables, functions, and iteration, the core ideas here will still stand alone.
#Python #SoftwareEngineering #OOP #Coding #ProgrammingTips #Python3DeepDive audience or perhaps focus on a specific technical example like the Descriptor protocol?
. Unlike beginner courses, it moves beyond basic syntax to explain how Python's data model and OOP principles work under the hood. Careers360 Core Topics Covered
Overriding __new__ allows you to control instance creation (e.g., caching, pooling, immutables). Never mutate __new__ without good reason, but understand it. You can inspect this order using the __mro__ attribute
The with statement, enabled by implementing __enter__ and __exit__ , ensures proper resource cleanup even when exceptions occur. Always prefer context managers (or try/finally blocks) over manual resource management.
ABCs define interfaces. They are not for performance; they are for .
class Base: def process(self): print("Base")
Implementing __eq__ , __lt__ , and __le__ allows objects to be compared natively using operators like == , < , and <= . dct): new_class = super().__new__(cls
: Class attributes are shared; instance attributes are local to each object.
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: Data descriptors (defining both get and set) take precedence over instance dictionaries, while non-data descriptors (only get) do not.
class PluginMeta(type): plugins = [] def __new__(cls, name, bases, dct): new_class = super().__new__(cls, name, bases, dct) if hasattr(new_class, 'run'): cls.plugins.append(new_class) return new_class