bad-format-character / E1300¶

Message emitted:

Unsupported format character %r (%#02x) at index %d

Description:

Used when an unsupported format character is used in a format string.

Problematic code:

print("%s %z" % ("hello", "world"))  # [bad-format-character]

Correct code:

print("%s %s" % ("hello", "world"))

Additional details:

This check is currently only active for "old-style" string formatting as seen in the examples. See Issue #6085 for more information.

Related links:

Created by the string checker.