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  • max-sixty · 4 ✖

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  • ds = xr.tutorial.load_dataset("air_temperature") with 0.18 needs engine argument · 4 ✖

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id html_url issue_url node_id user created_at updated_at ▲ author_association body reactions performed_via_github_app issue
841532936 https://github.com/pydata/xarray/issues/5291#issuecomment-841532936 https://api.github.com/repos/pydata/xarray/issues/5291 MDEyOklzc3VlQ29tbWVudDg0MTUzMjkzNg== max-sixty 5635139 2021-05-14T22:28:13Z 2021-05-14T22:28:13Z MEMBER

Thanks. Agree it's not worth that lift. 

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   ds = xr.tutorial.load_dataset("air_temperature") with 0.18 needs engine argument 889162918
841472615 https://github.com/pydata/xarray/issues/5291#issuecomment-841472615 https://api.github.com/repos/pydata/xarray/issues/5291 MDEyOklzc3VlQ29tbWVudDg0MTQ3MjYxNQ== max-sixty 5635139 2021-05-14T20:03:23Z 2021-05-14T20:03:23Z MEMBER

pip install xarray is always the minimal set of dependencies, but we can make something like pip install xarray[tutorial] work.

My question is whether we can make xarray by default pull the equivalent of xarray[tutorial], and a separate xarray[minimal] for anyone who really wants to avoid deps...

 
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   ds = xr.tutorial.load_dataset("air_temperature") with 0.18 needs engine argument 889162918
841423655 https://github.com/pydata/xarray/issues/5291#issuecomment-841423655 https://api.github.com/repos/pydata/xarray/issues/5291 MDEyOklzc3VlQ29tbWVudDg0MTQyMzY1NQ== max-sixty 5635139 2021-05-14T18:27:53Z 2021-05-14T18:27:53Z MEMBER

Thanks a lot @shoyer .

Is there a way of having pooch as a default but not required dependency? I'm not sure how python works with this — can we specify a minimal / required dependency set, but have pooch installed by default?

It's a pretty light dependency, and it's unfortunate to add any sand into the gears of getting someone to the tutorial. (though an order of magnitude better since the change above)

 
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   ds = xr.tutorial.load_dataset("air_temperature") with 0.18 needs engine argument 889162918
839406401 https://github.com/pydata/xarray/issues/5291#issuecomment-839406401 https://api.github.com/repos/pydata/xarray/issues/5291 MDEyOklzc3VlQ29tbWVudDgzOTQwNjQwMQ== max-sixty 5635139 2021-05-12T03:32:11Z 2021-05-12T03:32:11Z MEMBER

But if you don't have either scipy or netCDF4 installed, you get the very unhelpful error message ValueError: cannot guess the engine, try passing one explicitly

At the very least, we should report which engines are installed -- and ideally make a specific recommendation like installing scipy or netCDF4.

Yes and is this a problem with passing an engine? Could doing what it says ("passing one explicitly") make it work?

 
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   ds = xr.tutorial.load_dataset("air_temperature") with 0.18 needs engine argument 889162918

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