fix: resolve mypy error by casting IOBase to IO[bytes] for detect_filetype

Co-Authored-By: unknown <>

Author: devin-ai-integration[bot]

airbyte_cdk/sources/file_based/file_types/unstructured_parser.py

@@ -6,7 +6,7 @@
 import traceback
 from datetime import datetime
 from io import BytesIO, IOBase
-from typing import Any, Dict, Iterable, List, Mapping, Optional, Tuple, Union
+from typing import IO, Any, Dict, Iterable, List, Mapping, Optional, Tuple, Union, cast
 
 import backoff
 import dpath
@@ -424,7 +424,7 @@ def _get_filetype(self, file: IOBase, remote_file: RemoteFile) -> Optional[FileT
         if file_type and file_type != FileType.UNK:
             return file_type
 
-        type_based_on_content = detect_filetype(file=file)
+        type_based_on_content = detect_filetype(file=cast(IO[bytes], file))
         file.seek(0)  # detect_filetype is reading to read the file content, so we need to reset
 
         if type_based_on_content and type_based_on_content != FileType.UNK: