How can I ignore a lint error for a line with Sublime Text 3 Anaconda?

I am afraid that you can't ignore an error type (like line too long) just for some lines. You can't disable just warnings or violations neither.

It would be possible to implement some custom system like the #noqa comment in flake8 to make the plugin able to just ignore certain lines of code but this has to be implemented as it's not supported by the plugin and there are no plans to use flake8 in replacement of PyFlakes and pep8 that are already being used by separate.

There is a similar (but in a much more abstract way) request already in the issues in the GitHub project, you can find it here https://github.com/DamnWidget/anaconda/issues/142

To disable lints for specific errors, go to the Anaconda.sublime-settings file (Preferences > Packages Settings > Anaconda > Settings). There you will find several options depending on which linter you are using.

For example, to disable linting for "line too long" for pep8, fill in the following:

"pep8_ignore":
[
    "E501"
],

Also, the easiest way to find out the correct error code is to the view the lint error itself at the bottom of the screen.

As of today (Oct 15, 2017), it appears to me that you can use the # noqa syntax with Anaconda for Sublime Text 3. For line too long, you would add # noqa E501 to the end of the line.

Example:

shipping_account = models.ForeignKey(Account, related_name='order_shipping_set') # noqa E501