Looking at the docs, I couldn't find the `raise from` documentation anywhere in the Errors and Exceptions page (https://docs.python.org/3/tutorial/errors.html) page, which seems to be the landing page for Python Exceptions. 

I do see however that it is documented on the top page of https://docs.python.org/3/library/exceptions.html and raise statement's docs (https://docs.python.org/3/reference/simple_stmts.html#raise), both of which are pretty hard to discover. 

It would be nice to add the docs for `raise from` in the Errors and Exception page too.