Quality assurance in Python projects containing C modules

[Duncan Booth]

NoelByron at gmx.net wrote:

> Hello!
> 
> We are thinking about writing a project for several customers in
> Python. This project would include (among others) wxPython, a C/C++
> module. But what happens if this application generates a segmentation
> fault on a customers PC. What changes do we have to trace back the
> source of the error? Imagine you use two or three C libraries in a
> Python project and you experience random crashes in 'Python.exe'. What
> would you do?
> 
I would start by ensuring that any DLLs you write are written using Pyrex 
or Cython: almost always problems with C libraries called from Python are 
due to faulty reference counting but if you keep all of your Python related 
code in Pyrex/Cython modules the reference counting problem should be taken 
care of for you. You can call any required C/C++ code from the Cython code.