The behaviour may be configured at two levels.
The user settings are read from the ~/.config/flake8 file. Example:
[flake8] ignore = E226,E302,E41 max-line-length = 160
At the project level, a tox.ini file or a setup.cfg file is read if present. Only the first file is considered. If this file does not have a [flake8] section, no project specific configuration is loaded.
If the ignore option is not in the configuration and not in the arguments, only the error codes E226 and E241/E242 are ignored (see the :ref:`warning and error codes <error-codes>`).