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  • Datetime as coordinaets does not convert back to datetime (returns int) · 5 ✖
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808602928 https://github.com/pydata/xarray/issues/4880#issuecomment-808602928 https://api.github.com/repos/pydata/xarray/issues/4880 MDEyOklzc3VlQ29tbWVudDgwODYwMjkyOA== spencerkclark 6628425 2021-03-27T00:26:32Z 2021-03-27T00:26:32Z MEMBER

Yes I think unfortunately there is not much we can do here, since as @keewis noted, data_frame.coords["time"].data is a NumPy array.

This issue in general is a little tricky since xarray and pandas use nanosecond-precision datetime values, but datetime.datetime objects only have microsecond precision. See also discussion in https://github.com/numpy/numpy/issues/8546, https://github.com/numpy/numpy/issues/12550, and https://github.com/pydata/xarray/issues/3256.

 
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   Datetime as coordinaets does not convert back to datetime (returns int) 803075280
808149689 https://github.com/pydata/xarray/issues/4880#issuecomment-808149689 https://api.github.com/repos/pydata/xarray/issues/4880 MDEyOklzc3VlQ29tbWVudDgwODE0OTY4OQ== keewis 14808389 2021-03-26T11:40:10Z 2021-03-26T11:40:10Z MEMBER

Possibly, if this doesn't require any action from us. @spencerkclark, what do you think?

 
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   Datetime as coordinaets does not convert back to datetime (returns int) 803075280
808037776 https://github.com/pydata/xarray/issues/4880#issuecomment-808037776 https://api.github.com/repos/pydata/xarray/issues/4880 MDEyOklzc3VlQ29tbWVudDgwODAzNzc3Ng== feefladder 33122845 2021-03-26T08:34:27Z 2021-03-26T08:34:27Z CONTRIBUTOR

Yes, I created that issue :), should this then be closed?

 
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   Datetime as coordinaets does not convert back to datetime (returns int) 803075280
807686679 https://github.com/pydata/xarray/issues/4880#issuecomment-807686679 https://api.github.com/repos/pydata/xarray/issues/4880 MDEyOklzc3VlQ29tbWVudDgwNzY4NjY3OQ== keewis 14808389 2021-03-25T23:05:56Z 2021-03-25T23:05:56Z MEMBER

yes, I believe this to be a numpy issue: python date_frame.coords['time'].data[0] returns a numpy.datetime64[ns] object, which, casted to datetime.datetime using astype becomes a int. See numpy/numpy#18363 for the upstream issue.

 
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   Datetime as coordinaets does not convert back to datetime (returns int) 803075280
807612298 https://github.com/pydata/xarray/issues/4880#issuecomment-807612298 https://api.github.com/repos/pydata/xarray/issues/4880 MDEyOklzc3VlQ29tbWVudDgwNzYxMjI5OA== max-sixty 5635139 2021-03-25T22:21:35Z 2021-03-25T22:21:35Z MEMBER

Thanks for clear example. As per @keewis 's label, this does look like an upstream issue.

 
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   Datetime as coordinaets does not convert back to datetime (returns int) 803075280

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