covering all the hot paths through the loop. the VM would start tracing there. When the inner loop exits, the VM would detect that a different branch was taken. The VM would try to record a branch ...

适合谁看？刚把Python语法过完一遍、看到双重循环就头晕的新手，也包括写了好一阵代码但每次用嵌套都要现场推理执行顺序的同学。老手可以直接跳去最后两章看坑和优化思路，说不定能对上某一次线上调试时遇到的诡异现象。嵌套循环本身不复杂，复杂的是你对它的执行顺序有没有建立直觉。

"Do I really have to write out every single command to calculate 2x1, 2x2, 2x3...?" This is when you use 'repetition'. It is a mechanism for executing the same process multiple times, also called ...

Learn how to write cleaner Python with enumerate, zip, generator expressions, itertools, and functional tools for readable, memory-efficient data processing.

print("hello world, I'm learning Python"!) ...

Python libraries that replace hundreds of lines of custom code. LiteLLM, Instructor, Tenacity, and 5 more I use in every ...

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Numba turns Python loops into fast machine code. This guide covers three ways to speed up Python code with Numba: the njit decorator, parallel loops with prange, and caching, plus limits and mistakes ...