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Every time I send a line to python console in emacs python-mode, it executes split-window-below, like this:

enter image description here

On most computer screen the vertical dimension is stringent, thus it's more desireable to trigger split-window-right instead, like this:

enter image description here

This can be done manually (c-x 1 c-x 3 c-x o c-x b), but once you execute any python code from your source file, the layout returns to the annoying one.

Is there a way to customize this persistently?

Edit:

I have tried a few things, including the answer suggested in the comment below. So far it looks the following lines in .emacs "sort of" work:

(setq split-height-threshold nil)
(setq split-width-threshold 0)

except that they will make an extra window below:

enter image description here

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  • Please see the answer to this question for a general-purpose solution for telling Emacs to prefer side-by-side window splits over stacked ones. If you want to customize behavior for python-mode buffers only, you can simply wrap the call to setq (last line of the code in the answer) in a function: (defun prefer-side-by-side-splits () ...) and add that function to python-mode-hook via (add-hook 'python-mode-hook 'prefer-side-by-side-splits). Commented Jun 9, 2014 at 11:55
  • I tried that one, but it didn't change anything. Commented Jun 9, 2014 at 18:15

2 Answers 2

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Based on the fact that your modeline contains Py as a major mode indicator I am assuming you are using python-mode.el instead of the built-in python.el. This package defines a variable called py-split-windows-on-execute-function that allows you to specify which function to use for splitting windows when calling a command from the py-execute-* family.

To make horizontal (side-by-side) splitting the default for windows displaying python-mode buffers, add the following to your .emacs:

(require 'python-mode)
(setq-default py-split-windows-on-execute-function 'split-window-horizontally)

Note that you have to use setq-default instead of setq because py-split-windows-on-execute-function is a buffer-local variable.

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Comments

1

Or, in addition to what itsjeyd said, just:

M-x customize-variable RET py-split-windows-on-execute-function RET

Then select from "Value Menu"

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2 Comments

This is really nice. Is there something similar for ESS mode?
@qed Don't know. Maybe file a new question?

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