Change black linelength

upwart

I would like to reformat with black with another line length than the default of 88.
I know that this is in black/const.py, but this seems to be read only.
How can I change const.py, copy black completely or give command line parameters in the reformat command. Or ...?

ccc

@upwart Perhaps a pyproject.toml file with the right settings? I did not try that but it might work.

upwart

@ccc
That's a good suggestion.
I tried putting a proper pyproject.toml in the folder where the to-be-reformatted file resides or the parent folder. But it doesn't work.
@omz
It would be nice if I just could edit a file in the site-packages (built-in) , but that folder is obviously readonly. Making that folder read/write would also allow patches in other built in modules.

ccc

@upwart please see the psf/black docs to see what other config files they support.

upwart

@ccc
As far as I can see only pyproject.toml or command line parameters are supported. And changing const.py.
But none of these seem to be possible in Pythonista. Pitty!

cvp

This post is deleted!

upwart

This is to tell that I have managed to get black to use an alternative line length (160 in my case), by pip installing black. It will be installed in the site-packages (user) folder. And there, I can just patch the const.py file.
It seems to work perfectly. Hooray!

ccc

ruff.toml did not work?

upwart

@ccc
What do you mean with ruff.toml?
I tried pyproject.toml, but could get that working.

cvp

@upwart I don't know anything but this advice comes perhaps from this

upwart

@cvp
Thanks for thinking with me.
I know how to add the Black section to pyproject.toml. Just can't work out where to put it in Pythonista to work with reformat.
Anyway, I've it working now via a user installation of Back.