Pattern: Malformed formatted message for raised exception
Issue: -
Emitted when passing multiple arguments to an exception constructor, the first of them a string literal containing what appears to be placeholders intended for formatting.
This warning can be ignored on projects which deliberately use lazy formatting of messages in all user-facing exception handlers.
Example of incorrect code:
raise SomeError('message about %s', foo)
raise SomeError('message about {}', foo)Example of correct code:
def good_case():
raise SomeError('message about %s' % foo)
raise SomeError('message about {}'.format(foo))