how to go back to matching parenthesis in python-mode?

how to go back to matching parenthesis in python-mode?

[edgar]

Hi!

I would like to know if you can help me, please. I have this MWE 
(minimally working example):

     a = sum([val for val in range(10)])

If I set the point (cursor) at the end of the line and type `C-M b' 
(`backward-sexp'), I would expect to go back to the matching parenthesis 
next to `sum', but it takes me to the beginning of the line.

How can I go back to the matching parenthesis? Thank you

GNU Emacs 27.2 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.27, 
cairo version 1.17.4) of 2021-03-26
python.el:
;; URL: https://github.com/fgallina/python.el
;; Version: 0.28

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Re: how to go back to matching parenthesis in python-mode?

[Kévin Le Gouguec]

edgar@openmail.cc writes:

> How can I go back to the matching parenthesis? Thank you
>
> GNU Emacs 27.2 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.27,

Up to version 27.2, the recommended way (explained in the opening
commentary of python.el[1]) is to set forward-sexp-function to nil in
python-mode-hook:

(add-hook 'python-mode-hook
          (lambda () (setq forward-sexp-function nil)))

In 28.1, the new user option python-forward-sexp-function will let you
do away with the hook[2].


[1] https://git.savannah.gnu.org/cgit/emacs.git/tree/lisp/progmodes/python.el?h=emacs-27.2#n59
[2] https://git.savannah.gnu.org/cgit/emacs.git/tree/etc/NEWS?h=emacs-28&id=1e8be48738e1324edb9891ff6f7077bd1306cdd7#n2862

Re: how to go back to matching parenthesis in python-mode?

[edgar]

Hi Kévin,

On 2021-10-25 06:20, Kévin Le Gouguec wrote:
> Up to version 27.2, the recommended way (explained in the opening
> commentary of python.el[1]) is to set forward-sexp-function to nil in
> python-mode-hook:
> 
> (add-hook 'python-mode-hook
>           (lambda () (setq forward-sexp-function nil)))
> 
> In 28.1, the new user option python-forward-sexp-function will let you
> do away with the hook[2].


Thank you very much. I did check python.el, but only to see the 
function. I am sorry; I never imagined that this situation would be 
explained there. Much appreciated :) .


> [1]
> https://git.savannah.gnu.org/cgit/emacs.git/tree/lisp/progmodes/python.el?h=emacs-27.2#n59
> [2]
> https://git.savannah.gnu.org/cgit/emacs.git/tree/etc/NEWS?h=emacs-28&id=1e8be48738e1324edb9891ff6f7077bd1306cdd7#n2862

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Re: how to go back to matching parenthesis in python-mode?

[Emanuel Berg via Users list for the GNU Emacs text editor]

edgar wrote:

> Thank you very much. I did check python.el, but only to see
> the function. I am sorry; I never imagined that this
> situation would be explained there. Much appreciated :)

Just like girls ... you find them in the place you'd never
ever thought about looking.

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Re: how to go back to matching parenthesis in python-mode?

[Anders Munch]

edgar@openmail.cc wrote:
> On 2021-10-25 06:20, Kévin Le Gouguec wrote:
>> Up to version 27.2, the recommended way (explained in the opening 
>> commentary of python.el[1]) is to set forward-sexp-function to nil in
>> python-mode-hook:
>> 
>> (add-hook 'python-mode-hook
>>           (lambda () (setq forward-sexp-function nil)))
>> 
>> In 28.1, the new user option python-forward-sexp-function will let you 
>> do away with the hook[2].

It should be noted that this is not actually about python-mode, this is about the python mode python.el.

C-M-b works fine in python-mode.

regards, Anders