unused-format-string-key / W1301#
Message emitted:
Unused key %r in format string dictionary
Description:
Used when a format string that uses named conversion specifiers is used with a dictionary that contains keys not required by the format string.
Problematic code:
"The quick %(color)s fox jumps over the lazy dog." % {"color": "brown", "action": "hops"}
# -1: [unused-format-string-key]
Correct code:
"The quick %(color)s fox %(action)s over the lazy dog." % {"color": "brown", "action": "hops"}
Created by the string checker.