How to silence “sys.excepthook is missing” error?

Question

NB: I have not attempted to reproduce the problem described below under Windows, or with versions of Python other than 2.7.3.

The most reliable way to elicit the pro

Answer 1

In your program throws an exception that can not be caught using try/except block. To catch him, override function sys.excepthook:

import sys
sys.excepthook = lambda *args: None

From documentation:

sys.excepthook(type, value, traceback)

When an exception is raised and uncaught, the interpreter calls sys.excepthook with three arguments, the exception class, exception instance, and a traceback object. In an interactive session this happens just before control is returned to the prompt; in a Python program this happens just before the program exits. The handling of such top-level exceptions can be customized by assigning another three-argument function to sys.excepthook.

Illustrative example:

import sys
import logging

def log_uncaught_exceptions(exception_type, exception, tb):

    logging.critical(''.join(traceback.format_tb(tb)))
    logging.critical('{0}: {1}'.format(exception_type, exception))

sys.excepthook = log_uncaught_exceptions