Advanced Python features include metaclasses, descriptors, context managers, ABCs, functools, typing generics, concurrency models, __slots__, GC/memory management, AST, C extensions, and packaging. Master these to build production-grade libraries and frameworks.
Example
# Advanced Python quick reference
from abc import ABC, abstractmethod
from functools import lru_cache, wraps
from typing import Generic, TypeVar, Protocol
from contextlib import contextmanager
from dataclasses import dataclass, field
import asyncio
T = TypeVar("T")
# Each of these unlocks a deeper level of Python mastery.
Pro Tip
The best way to learn advanced Python is to read CPython source code and popular library implementations.