Navigating cpython source using python

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Navigating cpython source using python - quazirfan - Aug-07-2021

I am trying to read python source for some built in function/classes, but sometimes PyCharm is taking me to an autogenerated stub file which makes me think that the source might be written in C.

For example, when I try to get to the source of int(), PyCharm take me to this file,

[Image: EYvFmyu]

Image link: https://imgur.com/a/EYvFmyu

The file location in the PyCharm title bar tells me that it is an autogenerated file.

I know that cpython source is available at https://github.com/python/cpython, but it's hard to know where to find the source of a particular python function/class.

So my question is, where is the C source for int() class? And is there any well known guide out there for someone who is trying to connect python function/classes with corresponding cpython source?

RE: Navigating cpython source using python - Gribouillis - Aug-07-2021

The code for the integers is in longobject.c. I don't know a guide to C python source tree, but there are only a limited number of built-in types, it is not very difficult to find the corresponding code with a little experience.

RE: Navigating cpython source using python - snippsat - Aug-07-2021

(Aug-07-2021, 05:46 PM)quazirfan Wrote: And is there any well known guide out there for someone who is trying to connect python function/classes with corresponding cpython source?

Python source code layout Exploring CPython’s Internals

Quote:
Some exceptions:

builtin type int is at Objects/longobject.c

In documentation look at top if there Python code(Not C) it will link to source code eg calendar Source code: Lib/calendar.py
So this source file or method/function if has will also PyCharm or VS Code(Press Ctrl) for linking to source code.

pdir2 is fine for getting a nice layout how code is structured,example with calendar in image under.

RE: Navigating cpython source using python - quazirfan - Aug-09-2021

Thanks! They both looks fantastic.