Python 正则表达式使用look behinds解析Buffy脚本

我很难解析此页面：

我正在尝试获取角色名称和关联的对话。 文本如下所示：

<p>BUFFY: Wait!
<p>She stands there panting, watching the truck turn a corner.
<p>BUFFY: (whining) Don't you want your garbage?
<p>She sighs, pouts, turns and walks back toward the house.
<p>Cut to the kitchen. Buffy enters through the back door, holding a pile of
mail. She begins looking through it. We see Dawn standing by the island.
<p>DAWN: Hey Buffy. Oh, don't forget, today's trash day.<br>BUFFY: (sourly)
Thanks.
<p>Dawn piles her books into her school bag. Buffy opens a letter.
<p>Close shot of the letter.
<p>
<p>Dawn smiles, and she and Willow exit. Buffy picks up the still-wrapped
sandwich and stares at it.
<p>BUFFY: (to herself) Somebody should.
<p>She sighs, puts the sandwich back in the bag.
<p>Cut to the Bronze. Pan across various people drinking and dancing,
bartender serving. Reveal Xander and Anya sitting at the bar eating chips from
several bags. A notebook sits in front of them bearing the wedding seating
chart.
<p>ANYA: See ... this seating chart makes no sense. We have to do it again.
(Xander nodding) We can't do it again. You do it.<br>XANDER: The seating
chart's fine. Let's get back to the table arrangements. I'm starting to have
dreams of gardenia bouquets. (winces) I am so glad my manly coworkers didn't
just hear me say that. (eating chips)

巴菲：等等！ 她气喘吁吁地站在那里，看着卡车转弯。 巴菲：（抱怨）你不想要你的垃圾吗？ 她叹了口气，撅嘴，转身朝房子走去。 切到厨房去。巴菲从后门进来，手里拿着一堆纸 邮寄。她开始仔细看。我们看到黎明站在岛上。 道恩：嘿，巴菲。哦，别忘了，今天是垃圾日。
巴菲：（酸溜溜地） 谢谢 道恩把书塞进书包里。布菲打开一封信。 这封信的近景。 黎明微笑着，她和柳树离开了。布菲捡起仍然包着的衣服 三明治，盯着它看。 布菲：（对自己说）应该有人来。 她叹了口气，把三明治放回袋子里。 切割成青铜色。在喝酒跳舞的人群中穿梭， 服务生。展示了Xander和Anya坐在酒吧里吃薯条的情景 几包。他们面前放着一本笔记本，上面写着婚礼的座位 图表。 安雅：看。。。这个座位表毫无意义。我们必须再做一次。 （桑德点点头）我们不能再这样做了。你来做。
桑德：座位 查特很好。让我们回到餐桌安排上来。我开始有点紧张了 栀子花之梦。（畏缩）我很高兴我有男子气概的同事没有这么做 听我说。（吃薯条） 理想情况下，我会从

或

匹配到下一个
或

。我试着用look aheads和look backinds来做这个：

reg = "((?<=<p>)|(?<=<br>))(?P<character>.+):(?P<dialogue>.+)((?=<p>)|(?=<br>))"
script = re.findall(reg, html_text)

reg=“（（？围绕点符号：

re.findall('((?<=<p>)|(?<=<br>))([A-Z]+):([^<]+)', text)

re.findall（”（？围绕点符号工作：

re.findall('((?<=<p>)|(?<=<br>))([A-Z]+):([^<]+)', text)

re.findall（”（？哪种python？对我来说，第一个版本与某些东西匹配哪种python？对我来说，第一个版本与某些东西匹配谢谢你的帮助！谢谢你的帮助！