BeautifulSoup or Cheerio with selectors?

[magick93]

Hello

In the python implementation of langchain there is the BeautifulSoup4 document_loader, and similarly in js there is the cheerio loader.

How can I use either of these to select which portion of the web page I want to use in the document? It seems by default, and perhaps only, it is possible to load the entire web page, including all relevant, and irrelevant, text.