Fix pylint erros for sharkiq (#39428)

homeassistant/components/sharkiq/config_flow.py

@@ -30,10 +30,10 @@ async def validate_input(hass: core.HomeAssistant, data):
         with async_timeout.timeout(10):
             LOGGER.debug("Initialize connection to Ayla networks API")
             await ayla_api.async_sign_in()
-    except (asyncio.TimeoutError, aiohttp.ClientError):
-        raise CannotConnect
-    except SharkIqAuthError:
-        raise InvalidAuth
+    except (asyncio.TimeoutError, aiohttp.ClientError) as errors:
+        raise CannotConnect from errors
+    except SharkIqAuthError as error:
+        raise InvalidAuth from error
 
     # Return info that you want to store in the config entry.
     return {"title": data[CONF_USERNAME]}

homeassistant/components/sharkiq/update_coordinator.py

@@ -94,9 +94,9 @@ class SharkIqUpdateCoordinator(DataUpdateCoordinator):
                     )
                 )
 
-            raise UpdateFailed(err)
+            raise UpdateFailed(err) from err
         except Exception as err:  # pylint: disable=broad-except
             LOGGER.exception("Unexpected error updating SharkIQ", exc_info=err)
-            raise UpdateFailed(err)
+            raise UpdateFailed(err) from err
 
         return True