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  • mmartini-usgs · 2 ✖

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  • Choose time units in output netcdf · 2 ✖

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323180681 https://github.com/pydata/xarray/issues/1324#issuecomment-323180681 https://api.github.com/repos/pydata/xarray/issues/1324 MDEyOklzc3VlQ29tbWVudDMyMzE4MDY4MQ== mmartini-usgs 23199378 2017-08-17T20:10:34Z 2017-08-17T20:10:34Z NONE

Thanks - It turns out the workaround is to open the file with decoding_times = False

Is this a bug, or a feature?

In the notebook, those variables called time and time2 are not datetime objects (I demonstrate that). In fact, there are no datetime objects in the Notebook's scope, unless you count the CF time variable that is part of the open Dataset. And yet, time and time2 seem to be treated as such when the dataset is written to a file. Or, is it that the CF time in the Dataset is getting re-encoded somehow in spite of encoding=None? Why would that fail? Would you explain what is going on here?

I have updated my gist with the .info() information here:
https://gist.github.com/anonymous/ff055f732029585605b965f282685d73

 
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   Choose time units in output netcdf 216626776
322853199 https://github.com/pydata/xarray/issues/1324#issuecomment-322853199 https://api.github.com/repos/pydata/xarray/issues/1324 MDEyOklzc3VlQ29tbWVudDMyMjg1MzE5OQ== mmartini-usgs 23199378 2017-08-16T18:06:56Z 2017-08-16T18:06:56Z NONE

I think I have a similar problem.

I have a netCDF file with CF time. I'm trying to add two variables with a different kind of time (EPIC time, time2). These variables should not be datetime. They should be ordinary numbers.

Even when I don't include any units, it chokes on "units". Even with encoding = None ValueError: Failed hard to prevent overwriting key 'units' The gist is here: https://gist.github.com/anonymous/4614dfb55778cd0d51427daf6503cd8c

It's a time specific thing, because if I do the same operation with a different variable in the same file (read a variable, do something with it, then save it) it works fine. One clue is that it still carries the attributes (generally desired behavior) to the new file. But my EPIC time and time2 above, if they NOT datetime and have NO attributes... should work the same way.

This could be my misunderstanding of xarray and time operations, I'm a python newbie, if so I would appreciate someone setting me straight. It's preventing me from using xarray.

 
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   Choose time units in output netcdf 216626776

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