how to log qt exceptions raised in c++ in pyside2
I have an QT5/Pyside2 application happily logging into a file. Also exceptions are logged via excepthook:
sys.excepthook = lambda t, value, tb: log.exception(f'{t} {value} {"".join(traceback.format_exception(t, value, tb))}') But some exceptions raised by QT do not seem to pass the handler. They are simply printed to the console.
2020-07-14 13:42:51,676 - TRACE - sidewindow::__init__() - new view. call super. 2020-07-14 13:42:51,681 - TRACE - sidewindow::__init__() - show window and append QWindowsEGLStaticContext::createWindowSurface: Could not create the EGL window surface: 0x3003 qt.qpa.backingstore: composeAndFlush: makeCurrent() failed createDIB: CreateDIBSection failed (1273x666, format: 6) How can I redirect these Exceptions to a file or make python handle it?
I had the exact same problem in the past with PyQt, so I wrote a simple module that allows to set output files for both stdout and stderr. The module is called pyfreopen but has to be compiled.
Unfortunately I did it a lot of time ago, using Python 2.7, so it’s possible it won’t work on Python 3 (I’ll be at home later and will check if it can be built for Python 3 too).
The usage is very simple:
freopen.set_stdout(path="stderr.log") freopen.set_stderr(path="stdout.log") Note that, as explained in the readme, once the output is set, it cannot be restored to the default behavior.
