Replace `exit()`, `abort()` with return codes in C code called by Python and raise exceptions in Python

[MLopez-Ibanez]

Calling exit() or abort() in C code invoked by Python will kill the Python interpreter. CRAN has a way to detect theses issues in the R package.

• Replace exit() and abort() with return error values and catch those values in Python to raise the appropriate exception.
• Is there a tool that detects problematic C code for Python extensions like CRAN does?