uranusjr commented on a change in pull request #18755:
URL: https://github.com/apache/airflow/pull/18755#discussion_r724691416



##########
File path: airflow/providers/amazon/aws/transfers/mysql_to_s3.py
##########
@@ -92,15 +117,40 @@ def __init__(
         self.aws_conn_id = aws_conn_id
         self.verify = verify
 
-        self.pd_csv_kwargs = pd_csv_kwargs or {}
-        if "path_or_buf" in self.pd_csv_kwargs:
-            raise AirflowException('The argument path_or_buf is not allowed, 
please remove it')
-        if "index" not in self.pd_csv_kwargs:
-            self.pd_csv_kwargs["index"] = index
-        if "header" not in self.pd_csv_kwargs:
-            self.pd_csv_kwargs["header"] = header
+        if file_format == "csv":
+            self.file_format = FILE_FORMAT.CSV
+        else:
+            self.file_format = FILE_FORMAT.PARQUET
+
+        if pd_csv_kwargs:
+            warnings.warn(
+                "pd_csv_kwargs is deprecated. Please use pd_kwargs.",
+                DeprecationWarning,
+                stacklevel=2,
+            )
+        if index or header:
+            warnings.warn(
+                "index and header are deprecated. Please pass them via 
pd_kwargs.",
+                DeprecationWarning,
+                stacklevel=2,
+            )

Review comment:
       Personaly I like to pass things by explicit argument if possible, but 
that raises another question, would it be possible to pass *all* of `pd_kwargs` 
by explicit arguments, or why not?




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