linter changes

evadb/executor/load_executor.py

@@ -14,11 +14,12 @@
 # limitations under the License.
 from evadb.database import EvaDBDatabase
 from evadb.executor.abstract_executor import AbstractExecutor
+from evadb.executor.executor_utils import ExecutorError
 from evadb.executor.load_csv_executor import LoadCSVExecutor
 from evadb.executor.load_multimedia_executor import LoadMultimediaExecutor
 from evadb.parser.types import FileFormatType
 from evadb.plan_nodes.load_data_plan import LoadDataPlan
-from evadb.executor.executor_utils import ExecutorError
+
 
 class LoadDataExecutor(AbstractExecutor):
     def __init__(self, db: EvaDBDatabase, node: LoadDataPlan):
@@ -30,8 +31,8 @@ def exec(self, *args, **kwargs):
         """
 
         # invoke the appropriate executor
-        if self.node.file_options["file_format"] == None:
-            err_msg = f"Invalid file format, please use supported file formats: CSV | VIDEO | IMAGE | DOCUMENT | PDF"
+        if self.node.file_options["file_format"] is None:
+            err_msg = "Invalid file format, please use supported file formats: CSV | VIDEO | IMAGE | DOCUMENT | PDF"
             raise ExecutorError(err_msg)
         if self.node.file_options["file_format"] in [
             FileFormatType.VIDEO,