Handling empyty bucket list in sample usage

Author: caroline-ttd

examples/sample_get_identity_buckets.py

@@ -30,6 +30,9 @@ def _usage():
 
 identity_buckets_response = client.get_identity_buckets(datetime.datetime(year, month, day, hour, minute, second))
 
-bucket = identity_buckets_response.buckets[0]
-print("The bucket id of the first bucket: ", bucket.get_bucket_id())
-print("The last updated timestamp of the first bucket: ", bucket.get_last_updated())
+if identity_buckets_response.buckets:
+    bucket = identity_buckets_response.buckets[0]
+    print("The bucket id of the first bucket: ", bucket.get_bucket_id())
+    print("The last updated timestamp of the first bucket: ", bucket.get_last_updated())
+else:
+    print("No buckets were returned for this datetime")