This is a huge release that was created during the Hactoberfest season. It would have been impossible without the huge help from our awesome contributors. Thanks a lot to everyone!

This release is not focused on any particular area. It features a lot of new rules from different categories.

Features

• Adds cognitive complexity metric, introduced by cognitive_complexity
• Adds docstrings linter darglint
• Updates pep8-naming and flake8-comprehensions
• WPS431 now allow customize whitelist via nested-classes-whitelist setting
• Forbids to have invalid strings in stared expressions like **{'@': 1}
• Forbids to use implicit primitive values in a form of lambda: 0
• Forbids to use approximate math constants
• Forbids to redefine string constants
• Forbids use of vague import names (e.g. from json import loads)
• Makes OveruseOfNoqaCommentViolation configurable via --max-noqa-comments
• Forbid incorrectly swapped variables
• Forbids to use redundant subscripts (e.g., [0:7] or [3:None])
• Allows super() as a valid overused expression
• Forbids to use super() with other methods and properties
• WPS350 enforces using augmented assign pattern
• Forbids unnecessary literals
• WPS525 forbids comparisons where in is compared with single item container
• Forbids wrong annotations in assignment
• Forbids using multiline for and while statements
• WPS113 now can be tweaked with I_CONTROL_CODE setting
• Adds WPS000 that indicates internal errors
• Forbids to use implicit yield from

Full changelog: https://github.com/wemake-services/wemake-python-styleguide/releases/tag/0.13.0