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`string-dot-format-extra-positional-arguments` (`F523`)

crates/ruff_linter/resources/mdtest/pyflakes/string-dot-format-extra-positional-arguments.md

0.15.161.6 KB
Original Source

string-dot-format-extra-positional-arguments (F523)

toml
[lint]
select = ["F523"]

Regression tests for #15557

These should both trigger the rule, but their fixes should not remove the format call. In the first case, format will handle escaping {{ to {, while in the second case, removing the format call would suppress a KeyError:

py
print("{{".format("!"))  # snapshot: string-dot-format-extra-positional-arguments
print("{x}".format("!"))  # snapshot: string-dot-format-extra-positional-arguments
snapshot
error[F523]: `.format` call has unused arguments at position(s): 0
 --> src/mdtest_snippet.py:1:7
  |
1 | print("{{".format("!"))  # snapshot: string-dot-format-extra-positional-arguments
  |       ^^^^^^^^^^^^^^^^
  |
help: Remove extra positional arguments at position(s): 0
  - print("{{".format("!"))  # snapshot: string-dot-format-extra-positional-arguments
1 + print("{{".format())  # snapshot: string-dot-format-extra-positional-arguments
2 | print("{x}".format("!"))  # snapshot: string-dot-format-extra-positional-arguments


error[F523]: `.format` call has unused arguments at position(s): 0
 --> src/mdtest_snippet.py:2:7
  |
2 | print("{x}".format("!"))  # snapshot: string-dot-format-extra-positional-arguments
  |       ^^^^^^^^^^^^^^^^^
  |
help: Remove extra positional arguments at position(s): 0
1 | print("{{".format("!"))  # snapshot: string-dot-format-extra-positional-arguments
  - print("{x}".format("!"))  # snapshot: string-dot-format-extra-positional-arguments
2 + print("{x}".format())  # snapshot: string-dot-format-extra-positional-arguments