diff --git a/doc/whats-new.rst b/doc/whats-new.rst index 89bad8f99ad..088ffcc76dc 100644 --- a/doc/whats-new.rst +++ b/doc/whats-new.rst @@ -26,6 +26,9 @@ New Features Breaking changes ~~~~~~~~~~~~~~~~ +- Explicitly forbid appending a :py:class:`~xarray.DataTree` to zarr using :py:meth:`~xarray.DataTree.to_zarr` with ``append_dim``, because the expected behaviour is currently undefined. + (:issue:`9858`, :pull:`10156`) + By `Tom Nicholas `_. Deprecations ~~~~~~~~~~~~ diff --git a/xarray/core/datatree_io.py b/xarray/core/datatree_io.py index 31f5a93dd5e..2a7dd4010f1 100644 --- a/xarray/core/datatree_io.py +++ b/xarray/core/datatree_io.py @@ -103,6 +103,11 @@ def _datatree_to_zarr( "specifying a root group for the tree has not been implemented" ) + if "append_dim" in kwargs: + raise NotImplementedError( + "specifying ``append_dim`` with ``DataTree.to_zarr`` has not been implemented" + ) + if encoding is None: encoding = {} pFad - Phonifier reborn

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