python-attrs/attrs

Pattern Findings

The scanner identified 359 distinct pattern matches across 13 syntactic categories. Each entry below represents a discrete location in the source code where the engine recorded a detector match to inspect in context. Expand any category row to inspect the individual file paths, line numbers, code snippets, and the lexical context (CODE, COMMENT, or STRING) in which each match was detected.

Reading the findings table: The Severity column indicates the configured finding weight (CRITICAL / HIGH / MEDIUM / LOW). The Context column identifies whether the match occurred inside executable code, an inline comment, or a string literal — legacy comment-context matches receive a ×1.5 score weight. The ⚡ bolt icon marks clustered matches: three or more patterns within a 10-line window, each receiving an additional ×1.5 density multiplier under the legacy scoring model.

Hyper-Verbose Identifiers249 hits · 216 pts

Severity	File	Line	Snippet	Context
LOW	bench/test_benchmarks.py	48	def test_create_simple_class_make_class():	CODE
LOW	bench/test_benchmarks.py	72	def test_instantiate_no_defaults():	CODE
LOW	bench/test_benchmarks.py	80	def test_instantiate_with_defaults():	CODE
LOW	bench/test_benchmarks.py	218	def test_create_cached_property_class(self):	CODE
LOW	tests/test_pyright.py	89	def test_pyright_attrsinstance_compat(tmp_path):	CODE
LOW	tests/test_pyright.py	117	def test_pyright_field_converters_tuple(tmp_path):	CODE
LOW	tests/test_funcs.py	160	def test_lists_tuples_retain_type(self, container, C):	CODE
LOW	tests/test_funcs.py	214	def test_asdict_preserve_order(self, cls):	CODE
LOW	tests/test_funcs.py	223	def test_retain_keys_are_tuples(self):	CODE
LOW	tests/test_funcs.py	254	def test_named_tuple_retain_type(self):	CODE
LOW	tests/test_funcs.py	275	def test_type_error_with_retain_type(self):	CODE
LOW	tests/test_funcs.py	332	def assert_proper_tuple_class(obj, obj_tuple):	CODE
LOW	tests/test_funcs.py	413	def test_lists_tuples_retain_type(self, container, C):	CODE
LOW	tests/test_funcs.py	460	def test_named_tuple_retain_type(self):	CODE
LOW	tests/test_funcs.py	481	def test_type_error_with_retain_type(self):	CODE
LOW	tests/test_funcs.py	773	def test_regression_attrs_classes(self):	CODE
LOW	tests/test_forward_references.py	8	def test_forward_class_reference():	CODE
LOW	tests/test_utils.py	15	def test_returns_distinct_classes(self):	CODE
LOW	tests/test_converters.py	95	def test_annotations_if_last_in_pipe(self):	CODE
LOW	tests/strategies.py	52	def _create_hyp_nested_strategy(draw, simple_class_strategy):	CODE
LOW	tests/strategies.py	90	def simple_attrs_with_metadata(draw):	CODE
LOW	tests/test_functional.py	225	def test_subclassing_with_extra_attrs(self, cls):	CODE
LOW	tests/test_functional.py	240	def test_subclass_without_extra_attrs(self, base):	CODE
LOW	tests/test_functional.py	332	def test_subclassing_frozen_gives_frozen(self):	CODE
LOW	tests/test_functional.py	420	def test_handles_different_defaults(self):	CODE
LOW	tests/test_functional.py	437	def test_unsafe_hash_false_eq_false(self, slots):	CODE
LOW	tests/test_functional.py	545	def test_tuple_class_aliasing(self):	CODE
LOW	tests/test_functional.py	660	def test_no_setattr_if_validate_without_validators(self, slots):	CODE
LOW	tests/test_functional.py	684	def test_no_setattr_if_convert_without_converters(self, slots):	CODE
LOW	tests/test_functional.py	705	def test_no_setattr_with_ng_defaults(self, slots):	CODE
LOW	tests/test_functional.py	733	def test_on_setattr_detect_inherited_validators(self):	CODE
LOW	tests/test_setattr.py	51	def test_change_with_generator_hook(self):	CODE
LOW	tests/test_setattr.py	71	def test_generator_hook_executes_after_yielding(self):	CODE
LOW	tests/test_setattr.py	194	def test_generator_hook_not_called_in_init(self):	CODE
LOW	tests/test_setattr.py	214	def test_generator_hook_with_define(self):	CODE
LOW	tests/test_setattr.py	234	def test_generator_hook_class_level(self):	CODE
LOW	tests/test_setattr.py	262	def test_generator_pre_yield_exception(self):	CODE
LOW	tests/test_setattr.py	282	def test_generator_post_yield_exception(self):	CODE
LOW	tests/test_setattr.py	303	def test_generator_yields_multiple_times(self):	CODE
LOW	tests/test_setattr.py	344	def test_no_validator_no_converter(self):	CODE
LOW	tests/test_setattr.py	359	def test_validate_respects_run_validators_config(self):	CODE
LOW	tests/test_setattr.py	383	def test_frozen_on_setattr_class_is_caught(self):	CODE
LOW	tests/test_setattr.py	395	def test_frozen_on_setattr_attribute_is_caught(self):	CODE
LOW	tests/test_setattr.py	409	def test_frozen_on_setattr_nops(self, nop):	CODE
LOW	tests/test_setattr.py	418	def test_setattr_reset_if_no_custom_setattr(self, slots):	CODE
LOW	tests/test_setattr.py	443	def test_setattr_inherited_do_not_reset(self, slots):	CODE
LOW	tests/test_setattr.py	470	def test_pickling_retains_attrs_own(self, slots):	CODE
LOW	tests/test_setattr.py	487	def test_slotted_class_can_have_custom_setattr(self):	CODE
LOW	tests/test_setattr.py	526	def test_setattr_auto_detect_if_no_custom_setattr(self, slots):	CODE
LOW	tests/test_setattr.py	545	def test_setattr_restore_respects_auto_detect(self, slots):	CODE
LOW	tests/test_setattr.py	558	def test_setattr_auto_detect_frozen(self, slots):	CODE
LOW	tests/test_setattr.py	571	def test_setattr_auto_detect_on_setattr(self, slots):	CODE
LOW	tests/test_setattr.py	591	def test_setattr_inherited_do_not_reset_intermediate(	CODE
LOW	tests/test_setattr.py	633	def test_setattr_converter_piped(self):	CODE
LOW⚡	tests/test_make.py	2654	def test_eq_callable_order_boolean(self):	CODE
LOW⚡	tests/test_make.py	2663	def test_eq_callable_order_callable(self):	CODE
LOW⚡	tests/test_make.py	2672	def test_eq_boolean_order_callable(self):	CODE
LOW⚡	tests/test_make.py	2682	def test_order_mirrors_eq_by_default(self, eq):	CODE
LOW	tests/test_make.py	67	def _with_and_without_validation(request):	CODE
LOW	tests/test_make.py	92	def test_validators_lists_to_wrapped_tuples(self):	CODE
189 more matches not shown…

Unused Imports65 hits · 60 pts

Severity	File	Line	Context
LOW	bench/test_benchmarks.py	5	CODE
LOW	typing_tests/baseline.py	8	CODE
LOW	typing_tests/pyrefly.py	7	CODE
LOW	typing_tests/mypy.py	7	CODE
LOW	tests/test_pyright.py	3	CODE
LOW	tests/attr_import_star.py	4	CODE
LOW	tests/test_import.py	14	CODE
LOW	tests/test_hooks.py	3	CODE
LOW	src/attrs/setters.py	3	CODE
LOW	src/attrs/validators.py	3	CODE
LOW	src/attrs/__init__.py	3	CODE
LOW	src/attrs/__init__.py	3	CODE
LOW	src/attrs/__init__.py	3	CODE
LOW	src/attrs/__init__.py	3	CODE
LOW	src/attrs/__init__.py	3	CODE
LOW	src/attrs/__init__.py	3	CODE
LOW	src/attrs/__init__.py	3	CODE
LOW	src/attrs/__init__.py	3	CODE
LOW	src/attrs/__init__.py	3	CODE
LOW	src/attrs/__init__.py	3	CODE
LOW	src/attrs/__init__.py	3	CODE
LOW	src/attrs/__init__.py	3	CODE
LOW	src/attrs/__init__.py	3	CODE
LOW	src/attrs/__init__.py	3	CODE
LOW	src/attrs/__init__.py	3	CODE
LOW	src/attrs/__init__.py	3	CODE
LOW	src/attrs/__init__.py	3	CODE
LOW	src/attrs/__init__.py	3	CODE
LOW	src/attrs/__init__.py	3	CODE
LOW	src/attrs/__init__.py	25	CODE
LOW	src/attrs/__init__.py	26	CODE
LOW	src/attrs/__init__.py	26	CODE
LOW	src/attrs/__init__.py	26	CODE
LOW	src/attrs/__init__.py	28	CODE
LOW	src/attrs/__init__.py	28	CODE
LOW	src/attrs/__init__.py	28	CODE
LOW	src/attrs/exceptions.py	3	CODE
LOW	src/attrs/converters.py	3	CODE
LOW	src/attrs/filters.py	3	CODE
LOW	src/attr/__init__.py	12	CODE
LOW	src/attr/__init__.py	12	CODE
LOW	src/attr/__init__.py	13	CODE
LOW	src/attr/__init__.py	14	CODE
LOW	src/attr/__init__.py	14	CODE
LOW	src/attr/__init__.py	15	CODE
LOW	src/attr/__init__.py	15	CODE
LOW	src/attr/__init__.py	15	CODE
LOW	src/attr/__init__.py	15	CODE
LOW	src/attr/__init__.py	15	CODE
LOW	src/attr/__init__.py	16	CODE
LOW	src/attr/__init__.py	16	CODE
LOW	src/attr/__init__.py	16	CODE
LOW	src/attr/__init__.py	16	CODE
LOW	src/attr/__init__.py	16	CODE
LOW	src/attr/__init__.py	16	CODE
LOW	src/attr/__init__.py	16	CODE
LOW	src/attr/__init__.py	16	CODE
LOW	src/attr/__init__.py	30	CODE
LOW	src/attr/__init__.py	30	CODE
LOW	src/attr/__init__.py	30	CODE
5 more matches not shown…

Docstring Block Structure9 hits · 45 pts

Severity	File	Line	Snippet	Context
HIGH	src/attr/_make.py	590	Create a new instance, based on the first positional argument with changes applied. .. tip:: On	STRING
HIGH	src/attr/_make.py	1925	Return the tuple of attrs attributes for a class or instance. The tuple also allows accessing the fields by	STRING
HIGH	src/attr/_make.py	1976	Return an ordered dictionary of attrs attributes for a class, whose keys are the attribute names. Args:	STRING
HIGH	src/attr/_next_gen.py	656	Inspect the class and return its effective build parameters. Warning: This feature is currently **expe	STRING
HIGH	src/attr/_funcs.py	34	Return the attrs attribute values of inst as a dict. Optionally recurse into other attrs-decorated class	STRING
HIGH	src/attr/_funcs.py	237	Return the attrs attribute values of inst as a tuple. Optionally recurse into other attrs-decorated clas	STRING
HIGH	src/attr/_funcs.py	353	Check whether cls is a class with attrs attributes. Args: cls (type): Class to introspect. Ra	STRING
HIGH	src/attr/_funcs.py	381	Copy inst and apply changes. This is different from `evolve` that applies the changes to the arguments	STRING
HIGH	src/attr/_funcs.py	428	Resolve any strings and forward annotations in type annotations. This is only required if you need concrete ty	STRING

Deep Nesting14 hits · 14 pts

Severity	File	Line	Context
LOW	tests/test_funcs.py	104	CODE
LOW	tests/test_funcs.py	343	CODE
LOW	tests/test_funcs.py	111	CODE
LOW	tests/test_funcs.py	352	CODE
LOW	src/attr/_make.py	381	CODE
LOW	src/attr/_make.py	1353	CODE
LOW	src/attr/_make.py	2187	CODE
LOW	src/attr/_make.py	676	CODE
LOW	src/attr/_make.py	823	CODE
LOW	src/attr/_make.py	859	CODE
LOW	src/attr/_make.py	1478	CODE
LOW	src/attr/_funcs.py	26	CODE
LOW	src/attr/_funcs.py	152	CODE
LOW	src/attr/_funcs.py	230	CODE

Empty Error Handlers2 hits · 10 pts

Severity	File	Line	Snippet	Context
HIGH	src/attr/validators.py	669	except self.exc_types:	CODE
HIGH	src/attr/_make.py	996	except ValueError: # noqa: PERF203	CODE

AI Structural Patterns7 hits · 6 pts

Severity	File	Line	Context
LOW	tests/utils.py	11	CODE
LOW	tests/utils.py	40	CODE
LOW	src/attr/_make.py	104	CODE
LOW	src/attr/_make.py	1353	CODE
LOW	src/attr/_make.py	2531	CODE
LOW	src/attr/_next_gen.py	23	CODE
LOW	src/attr/_next_gen.py	434	CODE

Modern Structural Boilerplate5 hits · 5 pts

Severity	File	Line	Snippet	Context
LOW	src/attrs/__init__.py	31	__all__ = [	CODE
LOW	src/attr/validators.py	19	__all__ = [	CODE
LOW	src/attr/__init__.py	45	__all__ = [	CODE
LOW	src/attr/converters.py	11	__all__ = [	CODE
LOW	src/attr/_config.py	3	__all__ = ["get_run_validators", "set_run_validators"]	CODE

Slop Phrases1 hit · 3 pts

Severity	File	Line	Snippet	Context
MEDIUM	src/attr/_funcs.py	494	# Return the class so you can use it as a decorator too.	COMMENT

AI Slop Vocabulary2 hits · 2 pts

Severity	File	Line	Snippet	Context
MEDIUM	pyproject.toml	273	"DTZ", # datetime best practices don't matter in tests	STRING
MEDIUM	pyproject.toml	285	"TRY", # exception best practices don't matter in tests	STRING

Over-Commented Block2 hits · 2 pts

Severity	File	Line	Snippet	Context
LOW	typing_tests/mypy.py	161	# ConvCPipe(3.4)	COMMENT
LOW	src/attr/_compat.py	81		COMMENT

Dead Code1 hit · 2 pts

Severity	File	Line	Snippet	Context
MEDIUM	tests/test_setattr.py	269		CODE

Redundant / Tautological Comments1 hit · 2 pts

Severity	File	Line	Snippet	Context
LOW	src/attr/_make.py	708	# Check if the pre init method has more arguments than just `self`	COMMENT

Excessive Try-Catch Wrapping1 hit · 0 pts

Severity	File	Line	Snippet	Context
LOW	src/attr/validators.py	731	except Exception: # noqa: BLE001, PERF203, S112	STRING

Maintenance and Governance Review

Risk Review · v3

What These Metrics Mean

Pattern-Signal History

Severity Breakdown

Directory Score Breakdown

Pattern Findings