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  • Reading .grib files with xarray · 4 ✖

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1572276996 https://github.com/pydata/xarray/issues/7884#issuecomment-1572276996 https://api.github.com/repos/pydata/xarray/issues/7884 IC_kwDOAMm_X85dtwsE dcherian 2448579 2023-06-01T15:30:26Z 2023-06-01T15:30:26Z MEMBER

Please ask over at the cfgrib repo. But it does look like a bad environment / bad install.

 
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   Reading .grib files with xarray 1732510720
1570587416 https://github.com/pydata/xarray/issues/7884#issuecomment-1570587416 https://api.github.com/repos/pydata/xarray/issues/7884 IC_kwDOAMm_X85dnUMY keewis 14808389 2023-05-31T16:56:16Z 2023-05-31T16:58:23Z MEMBER

No module named '_cffi_backend'

Does simply import cfgrib work for you? I suspect it doesn't, which would explain the issue. It's unfortunate that the error is rewritten to "unknown engine", but I'm not sure how we would detect that it's a dependency that fails.

 
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   Reading .grib files with xarray 1732510720
1569021273 https://github.com/pydata/xarray/issues/7884#issuecomment-1569021273 https://api.github.com/repos/pydata/xarray/issues/7884 IC_kwDOAMm_X85dhV1Z keewis 14808389 2023-05-30T20:07:31Z 2023-05-30T20:08:04Z MEMBER

No, this should still work: sh conda create -n test -c conda-forge xarray ipython python=3.11 cfgrib pooch conda activate test ipython ```python import xarray as xr

xr.tutorial.open_dataset("era5-2mt-2019-03-uk.grib") `` We somewhat recently dropped the builtincfgribengine in favor of the one provided by thecfgribpackage (and that is also the reason why the example in the docs fails:cfgrib` is not installed into the docs environment anymore, which is definitely an oversight).

Which version of cfgrib do you have? For reference, in the environment built with the command above I have cfgrib=0.9.10.3

 
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   Reading .grib files with xarray 1732510720
1568726002 https://github.com/pydata/xarray/issues/7884#issuecomment-1568726002 https://api.github.com/repos/pydata/xarray/issues/7884 IC_kwDOAMm_X85dgNvy keewis 14808389 2023-05-30T16:23:30Z 2023-05-30T16:23:30Z MEMBER

as stated by the exception, the cfgrib engine is unknown, which usually means you're missing the cfgrib package (or this is a environment issue). If you did indeed install it, can you post the output of either conda list or pip list (in case you're not using conda)?

 
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   Reading .grib files with xarray 1732510720

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