Use iterative joinpath instead of unpacking in TFDS paths.

PiperOrigin-RevId: 911852255

Author: tomvdw

tensorflow_datasets/core/dataset_builder.py

@@ -153,7 +153,10 @@ def _get_builder_datadir_path(builder_cls: Type[Any]) -> epath.Path:
   """
   pkg_names = builder_cls.__module__.split(".")
   # -1 to remove the xxx.py python file.
-  return epath.resource_path(pkg_names[0]).joinpath(*pkg_names[1:-1])
+  path = epath.resource_path(pkg_names[0])
+  for pkg_name in pkg_names[1:-1]:
+    path = path.joinpath(pkg_name)
+  return path
 
 
 class DatasetBuilder(registered.RegisteredDataset):
@@ -343,7 +346,9 @@ def code_path(cls) -> epath.Path | None:
             or path.parts
         ):
           modules[-1] += ".py"
-          return path.joinpath(*modules[1:])
+          for module in modules[1:]:
+            path = path.joinpath(module)
+          return path
     # Otherwise, fallback to `pathlib.Path`. For non-zipapp, it should be
     # equivalent to the above return.
     try:

tensorflow_datasets/core/utils/resource_utils.py

@@ -47,7 +47,10 @@ def tfds_path(*relative_path: epath.PathLike) -> epath.Path:
   Returns:
     path: The root TFDS path.
   """
-  return root_tfds_path().joinpath(*relative_path)
+  path = root_tfds_path()
+  for pkg_name in relative_path:
+    path = path.joinpath(pkg_name)
+  return path
 
 
 def tfds_write_path(*relative_path: epath.PathLike) -> epath.Path: