chore: import upstream snapshot with attribution

python/ray/data/_internal/datasource/binary_datasource.py

@@ -0,0 +1,24 @@
+from typing import TYPE_CHECKING
+
+from ray.data._internal.arrow_block import ArrowBlockBuilder
+from ray.data.datasource.file_based_datasource import FileBasedDatasource
+
+if TYPE_CHECKING:
+    import pyarrow
+
+
+class BinaryDatasource(FileBasedDatasource):
+    """Binary datasource, for reading and writing binary files."""
+
+    _COLUMN_NAME = "bytes"
+
+    def _read_stream(self, f: "pyarrow.NativeFile", path: str):
+        data = f.readall()
+
+        builder = ArrowBlockBuilder()
+        item = {self._COLUMN_NAME: data}
+        builder.add(item)
+        yield builder.build()
+
+    def _rows_per_file(self):
+        return 1