How do you nicely capture exceptions in Python threads?

If you have a threaded python app sys.excepthook does not capture errors in children.

When a child raises an exception the parent will continue to run without any problems thus making debugging a bit difficult.

import os
import sys
import signal
import string
import threading# capture Exceptions
def except_catch(type, value, track, thread):import tracebackrawreport = traceback.format_exception(type, value, track)report = "\n" . join(rawreport)errorlog = open("errors.log", "a")if thread != "":errorlog.write("Exception in thread: " + thread + "\n\n")errorlog.write(("%s\n" + "-" * 30 + "\n\n") % report)errorlog.close()
sys.excepthook = except_catch# capture KeyboardInterrupt
def interrupt_catch(signal, frame):print ""os._exit(1)
signal.signal(signal.SIGINT, interrupt_catch)# all your threaded code here
def whatever_threaded_function():try:a = 1 / 0except:exc_type, exc_value, exc_traceback = sys.exc_info()except_catch(exc_type.__name__, exc_value, exc_traceback, threading.current_thread().name)threading.Thread(target=whatever_threaded_function).start()