[GitHub] [airflow] nuclearpinguin commented on a change in pull request #7506: [AIRFLOW-6877] [WIP] check cross providers dependencies depends on [AIRFLOW-6663]

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nuclearpinguin commented on a change in pull request #7506: [AIRFLOW-6877] [WIP] check cross providers dependencies depends on [AIRFLOW-6663]
URL: https://github.com/apache/airflow/pull/7506#discussion_r382935600
 
 

 ##########
 File path: airflow/providers/amazon/aws/operators/s3_to_redshift.py
 ##########
 @@ -15,13 +15,20 @@
 # KIND, either express or implied.  See the License for the
 # specific language governing permissions and limitations
 # under the License.
+import warnings
 from typing import List, Optional, Union
 
 from airflow.models import BaseOperator
 from airflow.providers.amazon.aws.hooks.s3 import S3Hook
-from airflow.providers.postgres.hooks.postgres import PostgresHook
 from airflow.utils.decorators import apply_defaults
 
+try:
+    from airflow.providers.postgres.hooks.postgres import PostgresHook
+except ImportError:
+    warnings.warn("The package providers-amazon-aws must be installed to use the operator.",
 
 Review comment:
   I am not sure I understand this warning... should it be `postgres` instead of `provider-amazon-aws`?

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