> It is expected that Python completion works out-of-the-box, without
> warnings.
Seems to be impossible, unfortunately. Does this commentary from
python.el help?
;; If your Python installation lacks readline (like CPython for
;; Windows), installing pyreadline (URL
;; `http://ipython.org/pyreadline.html ') should suffice. To
;; troubleshoot why you are not getting any completions, you can try the
;; following in your Python shell:
;; >>> import readline, rlcompleter
;; If you see an error, then you need to either install pyreadline or
;; setup custom code that avoids that dependency.