Python Advanced | Python Advanced | Selection With Sathi

📚 Python Advanced | Python Advanced
Generators, itertools, async/await, and context managers for developers and students

📌 Key Formulas:
1. Generators (yield): def gen(): yield value
2. itertools: chain, permutations, combinations, product
3. async / await Basics: async def func(): await coroutine()
4. Context Managers (__enter__/__exit__): class CM: __enter__ / __exit__ or @contextmanager

⏱️ Timestamps:
0:00 Introduction
0:17 Generators (yield)
0:43 itertools
1:06 async / await Basics
1:28 Context Managers (__enter__/__exit__)
1:50 Fibonacci Generator
2:09 itertools.combinations
2:30 Simple async Function
2:52 Custom Context Manager
3:12 Quick Tips & Tricks | टिप्स
3:37 Summary | सारांश

💡 Quick Tips:
• Use generators for large datasets — they don't load everything into memory
• itertools functions return lazy iterators — wrap with list() to see results
• async/await is for I/O-bound tasks — use multiprocessing for CPU-bound
• @contextmanager is much simpler than writing __enter__/__exit__ for most cases

📚 Useful for: Python, Interviews, GATE and all govt exams

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