percent-format-unsupported-format-character (F509)#
Derived from the Pyflakes linter.
What it does#
Checks for printf
-style format strings with invalid format characters.
Why is this bad?#
In printf
-style format strings, the %
character is used to indicate
placeholders. If a %
character is not followed by a valid format
character, it will raise a ValueError
at runtime.
Example#
Use instead: