1import atexit 2 3 4def application(environ, start_response): 5 def at_exit(): 6 environ['wsgi.errors'].write('At exit called.\n') 7 environ['wsgi.errors'].flush() 8 9 atexit.register(at_exit) 10 11 start_response('200', [('Content-Length', '0')]) 12 return [] 13