try: a ** b; print u"Сработало!"
except Exception as err: print u"Не сработало!"; senderrmsg(err) # Отправляем ошибку на почту

# ...
def main(argv=None):
    func1()
    func2()
    if cond1():
        func3()
if __name__ == '__main__':
    try:
        main(sys.argv)
    except KeyboardInterrupt:
        pass
    except Exception:
        excinfo = sys.exc_info()
        sendErrorReport(*excinfo)
        traceback.print_exception(*excinfo)

class Foo(object):
    def run(self):
        # Code here
if __name__=='__main__':
    try:
        foo=Foo()
        foo.run()
    except Exception:
        # send error