style: fix ruff E402 and ruff-format violations

Move imports to top of file and apply ruff-format to satisfy CI.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: kushalbakshi

src/datajoint/storage.py

@@ -372,9 +372,7 @@ def _create_filesystem(self) -> fsspec.AbstractFileSystem:
 
             adapter = get_storage_adapter(self.protocol)
             if adapter is None:
-                raise errors.DataJointError(
-                    f"Unsupported storage protocol: {self.protocol}"
-                )
+                raise errors.DataJointError(f"Unsupported storage protocol: {self.protocol}")
             return adapter.create_filesystem(self.spec)
 
     def _full_path(self, path: str | PurePosixPath) -> str:

src/datajoint/storage_adapter.py

@@ -41,15 +41,11 @@ def validate_spec(self, spec: dict[str, Any]) -> None:
         """Validate protocol-specific config fields."""
         missing = [k for k in self.required_keys if k not in spec]
         if missing:
-            raise errors.DataJointError(
-                f'{self.protocol} store is missing: {", ".join(missing)}'
-            )
+            raise errors.DataJointError(f'{self.protocol} store is missing: {", ".join(missing)}')
         all_allowed = set(self.allowed_keys) | _COMMON_STORE_KEYS
         invalid = [k for k in spec if k not in all_allowed]
         if invalid:
-            raise errors.DataJointError(
-                f'Invalid key(s) for {self.protocol}: {", ".join(invalid)}'
-            )
+            raise errors.DataJointError(f'Invalid key(s) for {self.protocol}: {", ".join(invalid)}')
 
     def full_path(self, spec: dict[str, Any], relpath: str) -> str:
         """Construct storage path from a relative path."""
@@ -61,17 +57,19 @@ def get_url(self, spec: dict[str, Any], path: str) -> str:
         return f"{self.protocol}://{path}"
 
 
-_COMMON_STORE_KEYS = frozenset({
-    "protocol",
-    "location",
-    "subfolding",
-    "partition_pattern",
-    "token_length",
-    "hash_prefix",
-    "schema_prefix",
-    "filepath_prefix",
-    "stage",
-})
+_COMMON_STORE_KEYS = frozenset(
+    {
+        "protocol",
+        "location",
+        "subfolding",
+        "partition_pattern",
+        "token_length",
+        "hash_prefix",
+        "schema_prefix",
+        "filepath_prefix",
+        "stage",
+    }
+)
 
 _adapter_registry: dict[str, StorageAdapter] = {}
 _adapters_loaded: bool = False

tests/unit/test_storage_adapter.py

@@ -2,7 +2,9 @@
 
 import pytest
 
+import datajoint as dj
 from datajoint.errors import DataJointError
+from datajoint.storage import StorageBackend
 from datajoint.storage_adapter import (
     StorageAdapter,
     _adapter_registry,
@@ -105,11 +107,9 @@ def test_default_url_format(self):
         assert self.adapter.get_url({}, "data/file.dat") == "dummy://data/file.dat"
 
 
-from datajoint.storage import StorageBackend
-
-
 class _FakeFS:
     """Minimal fake fsspec filesystem for testing."""
+
     protocol = "dummy"
 
 
@@ -178,9 +178,6 @@ def test_unsupported_protocol_error(self):
             backend._create_filesystem()
 
 
-import datajoint as dj
-
-
 class TestGetStoreSpecPluginDelegation:
     """Tests for plugin protocol handling in Config.get_store_spec()."""