test_proxy.py 文件源码

def _copy(self):
        '''
        Main select loop. Passes all data to self.master_read() or self.stdin_read().
        '''
        assert self.master_fd is not None
        master_fd = self.master_fd
        while True:
            rfds, wfds, xfds = select.select([master_fd, pty.STDIN_FILENO], [], [])

            anything = False

            if master_fd in rfds:
                anything |= self._has_child_response()
            if pty.STDIN_FILENO in rfds:
                anything |= self._has_user_input()

            if not anything:
                break