!17869 [MD] fix code check in master

Merge pull request !17869 from liyong126/fix_codecheck_master

mindspore/dataset/engine/datasets.py

@@ -3007,6 +3007,9 @@ class TransferDataset(Dataset):
             self._to_device.continue_send()
 
     def get_data_info(self):
+        """
+        Get type and shape of current batch
+        """
         if self._to_device is not None:
             return self._to_device.get_data_info()
         raise RuntimeError("Calling get_data_info with bad state.")

mindspore/mindrecord/tools/csv_to_mr.py

@@ -74,6 +74,9 @@ class CsvToMR:
 
     @staticmethod
     def check_columns(columns, columns_name):
+        """
+        Validate the columns of csv
+        """
         if not columns:
             return
         if isinstance(columns, list):