Re: Set variable in derived mode before running the parent mode function

[Andreas Röhler]

Am 06.06.2015 um 17:58 schrieb Philipp Stephani:
> Stefan Monnier <monnier@iro.umontreal.ca> schrieb am Mi., 3. Juni 2015 um
> 03:15 Uhr:
>
> > > `python-mode' are inappropriate for the derived mode; in particular, I'd
> > > like to disable auto-guessing of the indentation by setting
> > > `python-indent-guess-indent-offset' to nil.  However,
> > > `define-derived-mode' has no customization point for running code before
> > > the parent mode function.  What's the best way to solve this?
> > Add the code *after* running python-mode?  After all, setting vars
> > before would be a waste since python-mode (like all other proper major
> > modes) begins by calling kill-all-local-variables (also known as
> > fundamental-mode).
> You're right, that wouldn't work. The problem is that
> python-indent-guess-indent-offset prints a message if it couldn't guess the
> indentation; I'd like to suppress that message.


Disabling a message is another thing than disabling auto-guessing.

Look into python.el, definition of

python-indent-guess-indent-offset

Messaging is done from last line there. Put it at an extra line - i.e. a 
new line at the end of "(message
" sexp. Than comment out that line.