Anyway, check out the README, because a lot has changed, including the
package name. It's now bs4, not BeautifulSoup. This lets you have both
BS4 and BS3 on the same system, and it means that you type "from bs4
import BeautifulSoup" instead of "from BeautifulSoup import
BeautifulSoup", which if you type that as much as I do is a real
improvement.
So, Harry, to answer your question, the package name has changed, so
try bs4 instead of BeautifulSoup and it should work.
Leonard