Ensures that ipython-complete is called.

python-mode defines a key-binding for the tab key for its own
completion function (py-shell-complete) if that one wins, then
py-shell-complete will hang emacs as it tries to communicate
with the python shell process which does not exist. This uses
def-advice to instead call ipython-complete when py-shell-complete
is called.

docs/emacs/ipython.el

@@ -423,6 +423,14 b' in the current *Python* session."'
              (message "Making completion list...%s" "done")))))
 )
 
+;;; if python-mode's keybinding for the tab key wins then py-shell-complete is called
+;;; instead of ipython-complete which result in hanging emacs since there is no shell
+;;; process for python-mode to communicate with
+(defadvice py-shell-complete
+  (around avoid-py-shell-complete activate)
+  (ipython-complete))
+
+
 ;;; autoindent support: patch sent in by Jin Liu <[e-mail]>,
 ;;; originally written by [e-mail]
 ;;; Minor modifications by fperez for xemacs compatibility.