issue_comments: 828630825

Thanks. Marking this as a bug.

On Wed, Apr 28, 2021 at 2:14 AM Pontus Lurcock @.***> wrote:

Could you kindly share the Python traceback from the error message?

Sorry, that was remiss of me. Here's the output from the test script above, including the traceback.

$ python test_append_bytes.py Creating |U1 Zarr... Appending to |U1 Zarr with Zarr library... Appending to |U1 Zarr with xarray... Creating |S1 Zarr... Appending to |S1 Zarr with Zarr library... Appending to |S1 Zarr with xarray... Traceback (most recent call last): File "/home/pont/test_append_bytes.py", line 21, in <module> test_append("|S1", "test-s.zarr") File "/home/pont/test_append_bytes.py", line 18, in test_append ds_to_append.to_zarr(zarr_path, mode="a") File "/home/pont/loc/repos/xarray/xarray/core/dataset.py", line 1877, in to_zarr return to_zarr( File "/home/pont/loc/repos/xarray/xarray/backends/api.py", line 1414, in to_zarr _validate_datatypes_for_zarr_append(dataset) File "/home/pont/loc/repos/xarray/xarray/backends/api.py", line 1261, in _validate_datatypes_for_zarr_append check_dtype(k) File "/home/pont/loc/repos/xarray/xarray/backends/api.py", line 1252, in check_dtype raise ValueError( ValueError: Invalid dtype for data variable: <xarray.DataArray 'x' ()> array(b'', dtype='|S1') dtype must be a subtype of number, datetime, bool, a fixed sized string, a fixed size unicode string or an object

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