issue_comments: 1556869361

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https://github.com/pydata/xarray/pull/7827#issuecomment-1556869361 https://api.github.com/repos/pydata/xarray/issues/7827 1556869361 IC_kwDOAMm_X85cy_Dx 5821660 2023-05-22T09:24:47Z 2023-05-22T09:24:47Z MEMBER

@spencerkclark With current master I get the following RuntimeWarning running your code example:

  • on encoding (calling to_netcdf()):

python /home/kai/miniconda/envs/xarray_311/lib/python3.11/site-packages/xarray/coding/times.py:618: RuntimeWarning: invalid value encountered in cast int_num = np.asarray(num, dtype=np.int64)

  • on decoding (calling open_dataset()):

python /home/kai/miniconda/envs/xarray_311/lib/python3.11/site-packages/xarray/coding/times.py:254: RuntimeWarning: invalid value encountered in cast flat_num_dates_ns_int = (flat_num_dates * _NS_PER_TIME_DELTA[delta]).astype( /home/kai/miniconda/envs/xarray_311/lib/python3.11/site-packages/xarray/coding/times.py:254: RuntimeWarning: invalid value encountered in cast flat_num_dates_ns_int = (flat_num_dates * _NS_PER_TIME_DELTA[delta]).astype(

The latter was discussed in #7098 (casting float64 to int64), the former was aimed to be resolved with this PR.

I'll try to create a test case using Variable and the respective encoding/decoding functions without involving IO (per your suggestion @spencerkclark). 

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