ruff: Fix TRY002 Create your own exception.

Signed-off-by: Anders Kaseorg <anders@zulip.com>

Author: andersk

zulip/integrations/zephyr/zephyr_mirror_backend.py

@@ -73,7 +73,7 @@ def to_zephyr_username(zulip_username: str) -> str:
         return user.lower() + "@ATHENA.MIT.EDU"
     match_user = re.match(r"([a-zA-Z0-9_]+)\|(.+)", user)
     if not match_user:
-        raise Exception(f"Could not parse Zephyr realm for cross-realm user {zulip_username}")
+        raise ValueError(f"Could not parse Zephyr realm for cross-realm user {zulip_username}")
     return match_user.group(1).lower() + "@" + match_user.group(2).upper()
 
 
@@ -307,7 +307,7 @@ def maybe_restart_mirroring_script() -> None:
             except Exception:
                 logger.exception("Error restarting mirroring script; trying again... Traceback:")
                 backoff.fail()
-        raise Exception("Failed to reload too many times, aborting!")
+        raise RuntimeError("Failed to reload too many times, aborting!")
 
 
 def process_loop(zulip_queue: "Queue[ZephyrDict]", log: Optional[IO[str]]) -> NoReturn:

zulip_bots/zulip_bots/bots/xkcd/xkcd.py

@@ -114,7 +114,7 @@ def fetch_xkcd_query(mode: int, comic_id: Optional[str] = None) -> Dict[str, str
 
         elif mode == XkcdBotCommand.COMIC_ID:  # Fetch specific comic strip by id number.
             if comic_id is None:
-                raise Exception("Missing comic_id argument")
+                raise TypeError("Missing comic_id argument")
             url = XKCD_TEMPLATE_URL % (comic_id,)
 
         fetched = requests.get(url)

zulip_bots/zulip_bots/test_lib.py

@@ -68,9 +68,9 @@ def unique_response(self) -> Dict[str, Any]:
 
     def ensure_unique_response(self, responses: List[Dict[str, Any]]) -> None:
         if not responses:
-            raise Exception("The bot is not responding for some reason.")
+            raise ValueError("The bot is not responding for some reason.")
         if len(responses) > 1:
-            raise Exception("The bot is giving too many responses for some reason.")
+            raise ValueError("The bot is giving too many responses for some reason.")
 
 
 class DefaultTests: