我们在python的正则表达式使用过程中在手写筛选内容的时候就会经常出现【nothing to repeat at position 0】这个问题，一般是由于符号不识别的问题我们看看错误示例啊：
I need to: - start / stop sounds with lengths between 0.1 and 10 seconds - change the playback volume I want to / would like to / would be nice to have to:
加载中,请稍侯......