update example.

Author: ParagEkbote

.github/workflows/comet.yml

@@ -12,8 +12,6 @@ jobs:
   examples:
     if: (github.event_name == 'schedule' && github.repository == 'optuna/optuna-examples') || (github.event_name != 'schedule')
     runs-on: ubuntu-latest
-    env:
-      COMET_MODE: offline
     strategy:
       matrix:
         python-version: ['3.8', '3.9', '3.10', '3.11', '3.12']

comet/comet_callback.py

@@ -33,6 +33,8 @@
 # Log the project name
 experiment.set_name("comet-optuna-example")
 
+experiment = comet_ml.start(online=False)
+
 # Load dataset
 random_state = 42
 cancer = load_breast_cancer()