英文:
Python Xarray ValueError: unrecognized chunk manager dask - must be one of: []
问题
这个问题的原因是由于不识别的块管理器（unrecognized chunk manager）引起的。可能是由于在使用xarray.open_mfdataset时，没有正确配置Dask块管理器或没有安装Dask库。您需要确保已正确设置Dask块管理器或安装了Dask库，以便xarray可以使用它来处理数据块。
英文:
I am using xarray for combining multiple netcdf files using xarray.open_mfdataset. But I get the error while running the command, below are the commands and error.
nc_all = xarray.open_mfdataset(files,combine = 'nested', concat_dim="time")
files = glob.glob("/filepath/*")
I get the following error-
Traceback (most recent call last):
File "/home/lsrathore/GLEAM/GLEAM_HPC.py", line 85, in <module>
nc_1980_90 = xarray.open_mfdataset(files[1:11],combine = 'nested', concat_dim="time")
File "/home/lsrathore/.local/lib/python3.9/site-packages/xarray/backends/api.py", line 1038, in open_mfdataset
datasets = [open_(p, **open_kwargs) for p in paths]
File "/home/lsrathore/.local/lib/python3.9/site-packages/xarray/backends/api.py", line 1038, in <listcomp>
datasets = [open_(p, **open_kwargs) for p in paths]
File "/home/lsrathore/.local/lib/python3.9/site-packages/xarray/backends/api.py", line 572, in open_dataset
ds = _dataset_from_backend_dataset(
File "/home/lsrathore/.local/lib/python3.9/site-packages/xarray/backends/api.py", line 367, in _dataset_from_backend_dataset
ds = _chunk_ds(
File "/home/lsrathore/.local/lib/python3.9/site-packages/xarray/backends/api.py", line 315, in _chunk_ds
chunkmanager = guess_chunkmanager(chunked_array_type)
File "/home/lsrathore/.local/lib/python3.9/site-packages/xarray/core/parallelcompat.py", line 87, in guess_chunkmanager
raise ValueError(
ValueError: unrecognized chunk manager dask - must be one of: []
What is causing the problem?
答案1
得分: 5
问题在我将xarray版本从2023.5.0降级到0.21.1后得以解决。
英文:
The issue was resolved when I downgraded the xarray version to 0.21.1 from 2023.5.0
答案2
得分: 1
It works by downgrading the xarray version to 2022.11.0.
英文:
it works by downgraded the xarray version to 2022.11.0
答案3
得分: 0
它在我使用最新的xarray-2023.7.0时对我有效，如果我先安装dask：pip install dask。
xarray降级提示很有用，因为在dask上会出现"Module not found"错误，而不是上面的复杂错误消息，但在安装dask之后，我可以将xarray升级到最新版本，现在它正常工作。
英文:
It works for me with the latest xarray-2023.7.0 if I install dask first: pip install dask.
The xarray downgrade tip was useful as gives a 'Module not found' error on dask rather than the convoluted error message above, but after installing dask I was able to upgrade xarray to the latest and it works fine now.
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