betodealmeida commented on a change in pull request #6540: Make boto3/botocore 
installation optional
URL: 
https://github.com/apache/incubator-superset/pull/6540#discussion_r243659385
 
 

 ##########
 File path: superset/db_engine_specs.py
 ##########
 @@ -1065,6 +1064,9 @@ def convert_to_hive_type(col_type):
                     convert_to_hive_type(column_info['type'])))
         schema_definition = ', '.join(column_name_and_type)
 
+        # Optional dependency
+        import boto3  # pylint: disable=import-error
 
 Review comment:
   You can also keep this in the top of the file, and wrap it with an 
`ModuleNotFoundError`:
   
   ```python
   try:
       import boto3
   except ModuleNotFoundError:
       pass
   ```
   
   This way you don't need the lint exception.

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