How to customize the line character length in elpy?

Question

I am using elpy for my Python development, but I would like to set the per-line character limit to 120 instead of the default 80 used by PEP8. Any suggestions on how I can do this? Even better, it would be great if I can customize this setting on a per-project basis.

I have tried the following:

M-x customize-group elpy
M-x customize-mode elpy-mode
M-x customize-mode python-mode

but I can't seem to find the option that customizes the line character limit.

@Dan can you elaborate a bit? I tried setting fill-column (M-x set-fill-column and via M-x customize-variable fill-column), but elpy still shows an error for lines longer than 79 characters, with the message E501 line too long (81 > 79 characters). I tried refreshing the buffer too, but no luck. Any suggestions? — modulitos, Jun 13 '16 at 03:41
This seems like something that needs to be set through the flake8 config file or through the autopep8 config file depending on what you want. Take a look at the configuration page https://flake8.readthedocs.io/en/latest/config.html — Jules, Jun 13 '16 at 14:36

Chillar Anand · Accepted Answer · 2021-03-25T03:48:38.803

9

If you want to customize per project basis, you can create a setup.cfg with custom config like this

[flake8]
max-line-length = 160

If you want to change this globally, you can change flake8 config as mentioned here https://flake8.pycqa.org/en/latest/user/configuration.html#user-configuration

edited Mar 25 '21 at 03:48

answered Jun 13 '16 at 17:39

Chillar Anand

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Thank you very much! It's exactly what I needed, and now I see that I can use the flake8 config for my elpy-mode. It makes sense, because I believe elpy uses flake8 as the default syntax checker under the hood. – modulitos Jun 13 '16 at 19:48
5

That link is dead - this seems like the current version: https://flake8.readthedocs.io/en/latest/user/configuration.html#user-configuration – n1k31t4 Feb 09 '18 at 16:16
Would someone please tell me how this file is supposed to be created if it doesn't exist? And what's the path? – Qohelet Mar 24 '21 at 17:59
@Qohelet You can manually create the file and add the required sections to it. By default, it should be in your project root directory. https://docs.python.org/3/distutils/configfile.html – Chillar Anand Mar 25 '21 at 03:47
@n1k31t4 Thanks for the new link. Update it. – Chillar Anand Mar 25 '21 at 03:49
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@ChillarAnand - tried it and it doesn't work, that's how I came here. Emacs still complains – Qohelet Mar 25 '21 at 19:46
If you're on Linux/Mac, the config should be in ~/.config/flake8 (not ~/.config/.flake8) – eric.mitchell Aug 25 '21 at 04:39

How to customize the line character length in elpy?

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