unix_console.py 文件源码

def get_event(self, block=1):
        while self.event_queue.empty():
            while 1:
                # All hail Unix!
                try:
                    self.push_char(os.read(self.input_fd, 1))
                except (IOError, OSError) as err:
                    if err.errno == errno.EINTR:
                        if not self.event_queue.empty():
                            return self.event_queue.get()
                        else:
                            continue
                    else:
                        raise
                else:
                    break
            if not block:
                break
        return self.event_queue.get()