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[flake8-comprehensions] Account for list and set comprehensions in unnecessary-literal-within-tuple-call (C409) #12657

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merged 9 commits into from
Aug 5, 2024

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dylwil3
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@dylwil3 dylwil3 commented Aug 4, 2024

Summary

Make it a violation of C409 to call tuple with a list or set comprehension, and
implement the (unsafe) fix of calling the tuple with the underlying generator instead.

Closes #12648.

Test Plan

Test fixture updated, cargo test, docs checked for updated description.

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codspeed-hq bot commented Aug 4, 2024

CodSpeed Performance Report

Merging #12657 will not alter performance

Comparing dylwil3:tuple-comprehensions (6862cd3) with main (d6c6db5)

Summary

✅ 32 untouched benchmarks

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github-actions bot commented Aug 4, 2024

ruff-ecosystem results

Linter (stable)

✅ ecosystem check detected no linter changes.

Linter (preview)

ℹ️ ecosystem check detected linter changes. (+7 -0 violations, +0 -0 fixes in 4 projects; 50 projects unchanged)

apache/airflow (+4 -0 violations, +0 -0 fixes)

ruff check --no-cache --exit-zero --ignore RUF9 --output-format concise --preview --select ALL

+ airflow/providers/google/cloud/transfers/sql_to_gcs.py:259:41: C409 Unnecessary list comprehension passed to `tuple()` (rewrite as a generator)
+ dev/breeze/src/airflow_breeze/utils/packages.py:374:12: C409 Unnecessary list comprehension passed to `tuple()` (rewrite as a generator)
+ tests/_internals/capture_warnings.py:187:55: C409 Unnecessary list comprehension passed to `tuple()` (rewrite as a generator)
+ tests/always/test_example_dags.py:132:25: C409 Unnecessary list comprehension passed to `tuple()` (rewrite as a generator)

latchbio/latch (+1 -0 violations, +0 -0 fixes)

ruff check --no-cache --exit-zero --ignore RUF9 --output-format concise --preview

+ latch/functions/operators.py:106:27: C409 Unnecessary list comprehension passed to `tuple()` (rewrite as a generator)

mlflow/mlflow (+1 -0 violations, +0 -0 fixes)

ruff check --no-cache --exit-zero --ignore RUF9 --output-format concise --preview

+ tests/utils/test_uri.py:194:20: C409 Unnecessary list comprehension passed to `tuple()` (rewrite as a generator)

python/mypy (+1 -0 violations, +0 -0 fixes)

ruff check --no-cache --exit-zero --ignore RUF9 --output-format concise --preview

+ mypy/checkpattern.py:390:17: C409 Unnecessary list comprehension passed to `tuple()` (rewrite as a generator)

Changes by rule (1 rules affected)

code total + violation - violation + fix - fix
C409 7 7 0 0 0

@Skylion007
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I'd argue this is only safe to flag for list comprehensions as set comprehensions will dedup and potentially reorder elements as well (not that you should rely on that nondeterm ordering but still).

@dylwil3
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dylwil3 commented Aug 4, 2024

Good point! Another thing I noticed is that the suggestion text doesn't make sense in the context of comprehensions. I'll fix both next time I'm in front of a computer.

Thanks!

@dylwil3
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dylwil3 commented Aug 5, 2024

Ok, should be good to go!

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@charliermarsh charliermarsh left a comment

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Thanks! (FYI I had to move this behavior to preview to adhere to our versioning policy since it's an expansion in scope.)

@charliermarsh charliermarsh merged commit 25aabec into astral-sh:main Aug 5, 2024
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@charliermarsh charliermarsh added rule Implementing or modifying a lint rule preview Related to preview mode features labels Aug 5, 2024
@dylwil3 dylwil3 deleted the tuple-comprehensions branch August 5, 2024 11:12
@hauntsaninja
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hauntsaninja commented Aug 15, 2024

I find this kind of thing unfortunate, because tuple(i for i in range(10000)) is like 50% slower than tuple([i for i in range(10000)]).

There's no way to configure ruff to disambiguate between the two.
Edit: I should probably open a new issue #12912 :-)

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