[Bug] if dst not exists, when move a single file may raise a file not exist error. (#1803)

Author: KevinNuNu

mmocr/datasets/preparers/obtainers/naive_data_obtainer.py

@@ -191,6 +191,7 @@ def move(self, mapping: List[Tuple[str, str]]) -> None:
                         shutil.move(f, dst)
 
             elif osp.exists(src) and not osp.exists(dst):
+                mkdir_or_exist(osp.dirname(dst))
                 shutil.move(src, dst)
 
     def clean(self) -> None: