How can I capture all exceptions from a wxPython application?

Question

I\'m writing a little debug app for a bit of kit we\'re developing and I\'d like to roll it out to a few users to see if they can provoke any crashes. Does anyone know a way

Answer 1

For logging standard output, you can use a stdout wrapper, such as this one:

from __future__ import with_statement

class OutWrapper(object):
    def __init__(self, realOutput, logFileName):
        self._realOutput = realOutput
        self._logFileName = logFileName

    def _log(self, text):
        with open(self._logFileName, 'a') as logFile:
            logFile.write(text)

    def write(self, text):
        self._log(text)
        self._realOutput.write(text)

You then have to initialize it in your main Python file (the one that runs everything):

import sys    
sys.stdout = OutWrapper(sys.stdout, r'c:\temp\log.txt')

As to logging exceptions, the easiest thing to do is to wrap MainLoop method of wx.App in a try..except, then extract the exception information, save it in some way, and then re-raise the exception through raise, e.g.:

try:
    app.MainLoop()
except:
    exc_info = sys.exc_info()
    saveExcInfo(exc_info) # this method you have to write yourself
    raise