def __init__(self, *args, **kwargs):
super(InterruptibleMixin, self).__init__(*args, **kwargs)<EOL>self.original_handler = signal(SIGINT, self.handle_sigint)<EOL>if self.original_handler is None:<EOL><INDENT>self.original_handler = default_int_handler<EOL><DEDENT>
Save the original SIGINT handler for later.