Derived from the pycodestyle linter.
What it does#
Checks for lines that exceed the specified maximum character length.
Why is this bad?#
Overlong lines can hurt readability. PEP 8, for example, recommends
limiting lines to 79 characters. By default, this rule enforces a limit
of 88 characters for compatibility with Black, though that limit is
configurable via the
In the interest of pragmatism, this rule makes a few exceptions when determining whether a line is overlong. Namely, it:
- Ignores lines that consist of a single "word" (i.e., without any whitespace between its characters).
- Ignores lines that end with a URL, as long as the URL starts before the line-length threshold.
- Ignores line that end with a pragma comment (e.g.,
# type: ignoreor
# noqa), as long as the pragma comment starts before the line-length threshold. That is, a line will not be flagged as overlong if a pragma comment causes it to exceed the line length. (This behavior aligns with that of the Ruff formatter.)