[simo.salminen]

For standalone script, I recommend making an entry point default.py that does two things: setup logging, and starts the main app. This will speed up finding these kinds of probs. Note that this will start logging IFF debug\ subdir is present. This has added benefit that when you ship your program, and users run into problem, they can create the debug\ dir and you hopefully get the exception that occured.

default.py

import sys
import os

import logger

debug_path = os.path.join(os.path.dirname(sys.argv[0]), "debug")
if os.path.exists(debug_path):
    my_log = logger.Logger(os.path.join(debug_path, "debug.txt"))
    sys.stderr = sys.stdout = my_log
    print "debug started"

import yourapplication
yourapplication.run()

logger.py

class Logger:
    def __init__(self, log_name):
        self.logfile = log_name
        
    def write(self, obj):
        log_file = open(self.logfile, 'a')
        log_file.write(obj)
        log_file.close()
        
    def writelines(self, obj):
        self.write(''.join(list))
        
    def flush(self):
        pass