Stabilise [`slice-to-remove-prefix-or-suffix`](https://docs.astral.sh/ruff/rules/slice-to-remove-prefix-or-suffix/) (`FURB188`) for the Ruff 0.9 release.
This is a stylistic rule, but I think it's a pretty uncontroversial one. There are no open issues or PRs regarding it and it's been in preview for a while now.
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## Summary
Fix infinite loop issue reported here #15248.
The issue was caused by the break inside the if block, which caused the
flow to exit in an unforeseen way. This caused other issues, eventually
leading to an infinite loop.
Resolves#15248. Resolves#15336.
## Test Plan
Added failing code to fixture.
---------
Co-authored-by: Micha Reiser <micha@reiser.io>
Co-authored-by: dylwil3 <dylwil3@gmail.com>
When removing `int` in calls like `int(expr)` we may need to keep
parentheses around `expr` even when it is a function call or subscript,
since there may be newlines in between the function/value name and the
opening parentheses/bracket of the argument.
This PR implements that logic.
Closes#15263
---------
Co-authored-by: Charlie Marsh <charlie.r.marsh@gmail.com>
Note: `PLW0101` remains in testing rather than preview, so this PR does
not modify any public behavior (hence the title beginning with
`internal` rather than `pylint`, for the sake of the changelog.)
Fixes an error in the processing of `try` statements in the control flow
graph builder.
When processing a try statement, the block following a `return` was
forced to point to the `finally` block. However, if the return was _in_
the `finally` block, this caused the block to point to itself. In the
case where the whole `try-finally` statement was also included inside of
a loop, this caused an infinite loop in the builder for the control flow
graph as it attempted to resolve edges.
Closes#15248
## Test function
### Source
```python
def l():
while T:
try:
while ():
if 3:
break
finally:
return
```
### Control Flow Graph
```mermaid
flowchart TD
start(("Start"))
return(("End"))
block0[["`*(empty)*`"]]
block1[["Loop continue"]]
block2["return\n"]
block3[["Loop continue"]]
block4["break\n"]
block5["if 3:
break\n"]
block6["while ():
if 3:
break\n"]
block7[["Exception raised"]]
block8["try:
while ():
if 3:
break
finally:
return\n"]
block9["while T:
try:
while ():
if 3:
break
finally:
return\n"]
start --> block9
block9 -- "T" --> block8
block9 -- "else" --> block0
block8 -- "Exception raised" --> block7
block8 -- "else" --> block6
block7 --> block2
block6 -- "()" --> block5
block6 -- "else" --> block2
block5 -- "3" --> block4
block5 -- "else" --> block3
block4 --> block2
block3 --> block6
block2 --> return
block1 --> block9
block0 --> return
```
## Summary
Adds `class-as-data-structure` rule (`B903`). Also compare pylint's `too-few-public-methods` (`PLR0903`).
Took some creative liberty with this by allowing the class to have any
decorators or base classes. There are years-old issues on pylint that
don't approve of the strictness when it comes to these things.
Especially considering that dataclass is a decorator and namedtuple _can
be_ a base class. I feel ignoring those explicitly is redundant all
things considered, but it's not a hill I'm willing to die on!
See: #970
## Test Plan
`cargo test`
---------
Co-authored-by: Micha Reiser <micha@reiser.io>
Co-authored-by: dylwil3 <dylwil3@gmail.com>
The default logging level for diagnostics includes logs written using
the `log` crate with level `error`, `warn`, and `info`. An unsuccessful
fix attached to a diagnostic via `try_set_fix` or `try_set_optional_fix`
was logged at level `error`. Note that the user would see these messages
even without passing `--fix`, and possibly also on lines with `noqa`
comments.
This PR changes the logging level here to a `debug`. We also found
ad-hoc instances of error logging in the implementations of several
rules, and have replaced those with either a `debug` or call to
`try_set{_optional}_fix`.
Closes#15229
Micha Reiser
InSync
Dylan
Tom Kuson
Alex Waygood
Auguste Lalande
David Salvisberg
Victor Westerhuis
Steve C
Charlie Marsh
Avasam