My desktop distribution (SUSE 9.3) includes the packages python-doc-2.4-14 and python-doc-pdf-2.4-14. You also can get documentation from www.python.org.In either case, we want the Library Reference, ...

Python 3.8 added a new plus to f-strings: internal debugging. Add an equal sign to the end of an f-string expression and you’ll see additional data when the string is rendered: ...