python: How to trace function execution order in large project

Question

I want to trace function/class executive order in scrapy framework. There are multiple *.py files across the default project, and I want to know which py file and class has been

Answer 1

Well the best tool to trace function execution order is definitely viztracer. I would have to say that visualization is a huge factor when it comes to understanding a larger project.

An interactive image like this makes it much easier to understand what's going on in your program, compared to cold terminal ascii.

Also, it's a non-intrusive tool, which means you don't need to write a single line of code. Just install it and run your program with it.

pip install viztracer
viztracer your_script.py

Another important factor here is that viztracer supports multi-thread and multi-process, and can visualize them in separate signals, on the same timeline, which you'll never achieve with terminal display.