[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

jupyterlab_server/listings_handler.py

@@ -22,9 +22,7 @@ def fetch_listings(logger):
         blocked_extensions = []
         for blocked_extensions_uri in ListingsHandler.blocked_extensions_uris:
             logger.info(
-                "Fetching blocked_extensions from {}".format(
-                    ListingsHandler.blocked_extensions_uris
-                )
+                f"Fetching blocked_extensions from {ListingsHandler.blocked_extensions_uris}"
             )
             r = requests.request(
                 "GET", blocked_extensions_uri, **ListingsHandler.listings_request_opts
@@ -37,9 +35,7 @@ def fetch_listings(logger):
         allowed_extensions = []
         for allowed_extensions_uri in ListingsHandler.allowed_extensions_uris:
             logger.info(
-                "Fetching allowed_extensions from {}".format(
-                    ListingsHandler.allowed_extensions_uris
-                )
+                f"Fetching allowed_extensions from {ListingsHandler.allowed_extensions_uris}"
             )
             r = requests.request(
                 "GET", allowed_extensions_uri, **ListingsHandler.listings_request_opts

jupyterlab_server/themes_handler.py

@@ -82,7 +82,7 @@ def replacer(m):
             """Replace the matched relative url with the mangled url."""
             group = m.group()
             # Get the part that matched
-            part = [g for g in m.groups() if g][0]
+            part = next(g for g in m.groups() if g)
 
             # Ignore urls that start with `/` or have a protocol like `http`.
             parsed = urlparse(part)

jupyterlab_server/workspaces_handler.py

@@ -150,10 +150,7 @@ def save(self, space_name: str, raw: str) -> Path:
         metadata_id = metadata_id if metadata_id.startswith("/") else "/" + metadata_id
         metadata_id = urllib.parse.unquote(metadata_id)
         if metadata_id != "/" + space_name:
-            message = "Workspace metadata ID mismatch: expected {!r} got {!r}".format(
-                space_name,
-                metadata_id,
-            )
+            message = f"Workspace metadata ID mismatch: expected {space_name!r} got {metadata_id!r}"
             raise ValueError(message)
 
         slug = slugify(space_name)

tests/test_settings_api.py

@@ -124,7 +124,7 @@ async def test_listing_ids(jp_fetch, labserverapp):
 
     # Checks there is only the 'id' key in each item
     assert all(
-        (len(item.keys()) == 1 and list(item.keys())[0] == 'id') for item in response["settings"]
+        (len(item.keys()) == 1 and next(iter(item.keys())) == 'id') for item in response["settings"]
     )
 
 
@@ -177,7 +177,7 @@ async def test_patch(jp_fetch, labserverapp):
     validate_request(r)
     data = json.loads(r.body.decode())
     listing = data["settings"]
-    list_data = [item for item in listing if item["id"] == id][0]
+    list_data = next(item for item in listing if item["id"] == id)
     # TODO(@echarles) Check this...