Explain Python internals and practices

Q: Explain Python internals and practices

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Question

Answer the following Python deep-dive questions:

Explain the Global Interpreter Lock (GIL) and its impact on CPU-bound vs I/O-bound tasks.
Compare threading, multiprocessing, and asyncio; provide scenarios and short code snippets for each.
Implement and explain a custom context manager and a decorator; discuss common use cases.
Describe iterators and generators, including yield from , generator cleanup, and backpressure.
Discuss type hints (PEP 484), dataclasses , and static analysis tools (e.g., mypy); show how types improve maintainability.
Explain packaging and environments (venv, pip, wheels) and dependable dependency management (pinning, lock files, reproducibility).
Identify performance pitfalls and demonstrate profiling (cProfile, line_profiler) and optimization techniques (vectorization, caching, PyPy/C extensions).
Describe Python memory management (reference counting, cyclic GC) and strategies to avoid leaks.
Outline exception handling best practices and how to design custom exceptions.

Explain Python internals and practices

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