add ruff, drop black/isort/flynt

.pre-commit-config.yaml

@@ -3,37 +3,29 @@ default_stages: [pre-commit, pre-push]
 default_language_version:
   # force all unspecified python hooks to run python3
   python: python3
-minimum_pre_commit_version: "1.20.0"
+minimum_pre_commit_version: "4.5.1"
 repos:
   - repo: meta
     hooks:
       - id: check-hooks-apply
 
-  - repo: https://github.com/asottile/pyupgrade
-    rev: v2.38.4
-    hooks:
-      - id: pyupgrade
-        args: ["--py36-plus"]
-
   - repo: local
     hooks:
-      - id: flynt
-        name: Convert to f-strings with flynt
-        entry: flynt
-        language: python
-        additional_dependencies: ['flynt==0.76']
-
-      - id: black
-        name: black
-        entry: black
+      - id: ruff-format
+        name: ruff format
+        entry: ruff
+        args:
+          - format
+        types: [ python ]
         language: system
-        require_serial: true
-        types: [python]
 
-      - id: isort
-        name: isort
-        entry: isort
-        args: ['--filter-files']
+      - id: ruff-check
+        name: ruff check
+        entry: ruff
+        args:
+          - check
+          - --fix
+          - --exit-non-zero-on-fix
+          - --show-fixes
+        types: [ python ]
         language: system
-        require_serial: true
-        types: [python]

AGENTS.md

@@ -10,7 +10,7 @@ Use this as the default operating playbook when making changes.
 - Runtime package: `openapi_schema_validator/`.
 - Tests: `pytest` in `tests/unit` and `tests/integration`.
 - Type checking: `mypy` with `strict = true`.
-- Formatting and imports: `black` and `isort`.
+- Formatting and imports: `ruff`.
 - Extra static analysis: `deptry`.
 - Supported Python versions: 3.10, 3.11, 3.12, 3.13, 3.14.
 
@@ -68,9 +68,8 @@ Run commands from repository root.
 
 - Full pre-commit run: `poetry run pre-commit run -a`
 - Staged files pre-commit run: `poetry run pre-commit run`
-- Format explicitly: `poetry run black .`
-- Sort imports explicitly: `poetry run isort .`
-- Convert to f-strings where safe: `poetry run flynt .`
+- Format explicitly: `poetry run ruff format .`
+- Lint code: `poetry run ruff check .`
 - Dependency hygiene: `poetry run deptry .`
 
 ### Build package / docs

benchmarks/cases.py

@@ -117,30 +117,14 @@ def build_cases() -> list[BenchmarkCase]:
                         },
                         "Route": {
                             "oneOf": [
-                                {
-                                    "$ref": (
-                                        "#/components/schemas/"
-                                        "MountainHiking"
-                                    )
-                                },
-                                {
-                                    "$ref": (
-                                        "#/components/schemas/"
-                                        "AlpineClimbing"
-                                    )
-                                },
+                                {"$ref": ("#/components/schemas/MountainHiking")},
+                                {"$ref": ("#/components/schemas/AlpineClimbing")},
                             ],
                             "discriminator": {
                                 "propertyName": "discipline",
                                 "mapping": {
-                                    "mountain_hiking": (
-                                        "#/components/schemas/"
-                                        "MountainHiking"
-                                    ),
-                                    "alpine_climbing": (
-                                        "#/components/schemas/"
-                                        "AlpineClimbing"
-                                    ),
+                                    "mountain_hiking": ("#/components/schemas/MountainHiking"),
+                                    "alpine_climbing": ("#/components/schemas/AlpineClimbing"),
                                 },
                             },
                         },

benchmarks/compare.py

@@ -45,10 +45,7 @@ def _parse_args() -> argparse.Namespace:
         "--regression-threshold",
         type=float,
         default=0.0,
-        help=(
-            "Percent threshold for regressions. "
-            "Example: 5 means fail only when regression exceeds 5%%."
-        ),
+        help="Percent threshold for regressions. Example: 5 means fail only when regression exceeds 5%%.",
     )
     parser.add_argument(
         "--fail-on-regression",
@@ -102,9 +99,7 @@ def _compare_reports(
 
     for case_name in sorted(baseline_cases):
         if case_name not in candidate_cases:
-            regressions.append(
-                f"Missing case in candidate report: {case_name}"
-            )
+            regressions.append(f"Missing case in candidate report: {case_name}")
             continue
 
         report_lines.append(f"Case: {case_name}")
@@ -119,19 +114,14 @@ def _compare_reports(
             status = _format_status(regression, change)
 
             report_lines.append(
-                "  "
-                f"{metric}: baseline={baseline_value:.6f} "
-                f"candidate={candidate_value:.6f} -> {status}"
+                f"  {metric}: baseline={baseline_value:.6f} candidate={candidate_value:.6f} -> {status}"
             )
 
             if regression and abs(change) > regression_threshold:
-                regressions.append(
-                    f"{case_name} {metric} regressed by {abs(change):.2f}%"
-                )
+                regressions.append(f"{case_name} {metric} regressed by {abs(change):.2f}%")
 
     extra_candidate_cases = set(candidate_cases).difference(baseline_cases)
-    for case_name in sorted(extra_candidate_cases):
-        report_lines.append(f"Case present only in candidate: {case_name}")
+    report_lines.extend(f"Case present only in candidate: {case_name}" for case_name in sorted(extra_candidate_cases))
 
     return report_lines, regressions
 
@@ -146,15 +136,12 @@ def main() -> int:
         args.regression_threshold,
     )
 
-    print(
-        f"Comparing candidate {args.candidate} "
-        f"against baseline {args.baseline}"
-    )
-    print("")
+    print(f"Comparing candidate {args.candidate} against baseline {args.baseline}")
+    print()
     print("\n".join(report_lines))
 
     if regressions:
-        print("")
+        print()
         print("Regressions above threshold:")
         for regression in regressions:
             print(f"- {regression}")

docs/conf.py

@@ -61,7 +61,6 @@ def _read_project_version() -> str:
             "scheme": "slate",
             "primary": "lime",
             "accent": "amber",
-            "scheme": "slate",
             "toggle": {
                 "icon": "material/toggle-switch",
                 "name": "Switch to light mode",

openapi_schema_validator/__init__.py

@@ -19,17 +19,17 @@
 __license__ = "3-clause BSD License"
 
 __all__ = [
-    "validate",
+    "OAS31_BASE_DIALECT_ID",
+    "OAS32_BASE_DIALECT_ID",
     "OAS30ReadValidator",
     "OAS30StrictValidator",
-    "OAS30WriteValidator",
     "OAS30Validator",
+    "OAS30WriteValidator",
+    "OAS31Validator",
+    "OAS32Validator",
     "oas30_format_checker",
     "oas30_strict_format_checker",
-    "OAS31Validator",
     "oas31_format_checker",
-    "OAS32Validator",
     "oas32_format_checker",
-    "OAS31_BASE_DIALECT_ID",
-    "OAS32_BASE_DIALECT_ID",
+    "validate",
 ]

openapi_schema_validator/_caches.py

@@ -1,9 +1,9 @@
 from collections import OrderedDict
+from collections.abc import Hashable
+from collections.abc import Mapping
 from dataclasses import dataclass
 from threading import RLock
 from typing import Any
-from typing import Hashable
-from typing import Mapping
 
 from jsonschema.protocols import Validator
 
@@ -23,12 +23,7 @@ def __init__(self) -> None:
 
     def _freeze_value(self, value: Any) -> Hashable:
         if isinstance(value, dict):
-            return tuple(
-                sorted(
-                    (str(key), self._freeze_value(item))
-                    for key, item in value.items()
-                )
-            )
+            return tuple(sorted((str(key), self._freeze_value(item)) for key, item in value.items()))
         if isinstance(value, list):
             return tuple(self._freeze_value(item) for item in value)
         if isinstance(value, tuple):

openapi_schema_validator/_dialects.py

@@ -2,9 +2,7 @@
 
 from jsonschema.validators import validates
 
-from openapi_schema_validator._specifications import (
-    REGISTRY as OPENAPI_SPECIFICATIONS,
-)
+from openapi_schema_validator._specifications import REGISTRY as OPENAPI_SPECIFICATIONS
 
 __all__ = [
     "OAS31_BASE_DIALECT_ID",

openapi_schema_validator/_format.py

@@ -1,6 +1,5 @@
 import binascii
 from base64 import b64decode
-from base64 import b64encode
 from numbers import Number
 
 from jsonschema._format import FormatChecker
@@ -106,9 +105,7 @@ def is_regex(instance: object) -> bool:
 oas30_strict_format_checker.checks("float")(is_float)
 oas30_strict_format_checker.checks("double")(is_double)
 oas30_strict_format_checker.checks("binary")(is_binary_strict)
-oas30_strict_format_checker.checks("byte", (binascii.Error, TypeError))(
-    is_byte
-)
+oas30_strict_format_checker.checks("byte", (binascii.Error, TypeError))(is_byte)
 oas30_strict_format_checker.checks("password")(is_password)
 oas30_strict_format_checker.checks("regex")(is_regex)
 

openapi_schema_validator/_keywords.py

@@ -1,6 +1,6 @@
+from collections.abc import Iterator
+from collections.abc import Mapping
 from typing import Any
-from typing import Iterator
-from typing import Mapping
 from typing import cast
 
 from jsonschema._keywords import allOf as _allOf
@@ -18,9 +18,7 @@
 from openapi_schema_validator._regex import search as regex_search
 
 
-def handle_discriminator(
-    validator: Any, _: Any, instance: Any, schema: Mapping[str, Any]
-) -> Iterator[ValidationError]:
+def handle_discriminator(validator: Any, _: Any, instance: Any, schema: Mapping[str, Any]) -> Iterator[ValidationError]:
     """
     Handle presence of discriminator in anyOf, oneOf and allOf.
     The behaviour is the same in all 3 cases because at most 1 schema will match.
@@ -29,9 +27,7 @@ def handle_discriminator(
     prop_name = discriminator["propertyName"]
 
     if not validator.is_type(instance, "object"):
-        yield ValidationError(
-            f"{instance!r} is not of type 'object'", context=[]
-        )
+        yield ValidationError(f"{instance!r} is not of type 'object'", context=[])
         return
 
     prop_value = instance.get(prop_name)
@@ -44,10 +40,7 @@ def handle_discriminator(
         return
 
     # Use explicit mapping if available, otherwise try implicit value
-    ref = (
-        discriminator.get("mapping", {}).get(prop_value)
-        or f"#/components/schemas/{prop_value}"
-    )
+    ref = discriminator.get("mapping", {}).get(prop_value) or f"#/components/schemas/{prop_value}"
 
     if not isinstance(ref, str):
         # this is a schema error
@@ -132,11 +125,7 @@ def type(
         yield ValidationError("None for not nullable")
 
     # Pragmatic: allow bytes for binary format (common in Python use cases)
-    if (
-        data_type == "string"
-        and schema.get("format") == "binary"
-        and isinstance(instance, bytes)
-    ):
+    if data_type == "string" and schema.get("format") == "binary" and isinstance(instance, bytes):
         return
 
     if not validator.is_type(instance, data_type):
@@ -183,9 +172,7 @@ def pattern(
     try:
         matches = regex_search(patrn, instance)
     except ECMARegexSyntaxError as exc:
-        yield ValidationError(
-            f"{patrn!r} is not a valid regular expression ({exc})"
-        )
+        yield ValidationError(f"{patrn!r} is not a valid regular expression ({exc})")
         return
 
     if not matches:
@@ -235,11 +222,8 @@ def required(
             if prop_schema:
                 read_only = prop_schema.get("readOnly", False)
                 write_only = prop_schema.get("writeOnly", False)
-                if (
-                    getattr(validator, "write", True)
-                    and read_only
-                    or getattr(validator, "read", True)
-                    and write_only
+                if (getattr(validator, "write", True) and read_only) or (
+                    getattr(validator, "read", True) and write_only
                 ):
                     continue
             yield ValidationError(f"{property!r} is a required property")
@@ -299,10 +283,9 @@ def additionalProperties(
         for extra in extras:
             for error in validator.descend(instance[extra], aP, path=extra):
                 yield error
-    elif validator.is_type(aP, "boolean"):
-        if not aP:
-            error = "Additional properties are not allowed (%s %s unexpected)"
-            yield ValidationError(error % extras_msg(extras))
+    elif validator.is_type(aP, "boolean") and not aP:
+        error = "Additional properties are not allowed (%s %s unexpected)"
+        yield ValidationError(error % extras_msg(extras))
 
 
 def write_readOnly(

openapi_schema_validator/_regex.py

@@ -5,10 +5,13 @@
 _REGRESS_ERROR: type[Exception] = Exception
 
 try:
-    from regress import Regex as _REGEX_CLASS
-    from regress import RegressError as _REGRESS_ERROR
+    from regress import Regex as _RegressRegex
+    from regress import RegressError as _RegressError
 except ImportError:  # pragma: no cover - optional dependency
     pass
+else:
+    _REGEX_CLASS = _RegressRegex
+    _REGRESS_ERROR = _RegressError
 
 
 class ECMARegexSyntaxError(ValueError):

openapi_schema_validator/_specifications.py

@@ -1,7 +1,7 @@
 import json
+from collections.abc import Iterator
 from importlib.resources import files
 from typing import Any
-from typing import Iterator
 
 from jsonschema_specifications import REGISTRY as JSONSCHEMA_REGISTRY
 from referencing import Resource