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1081069771 PR_kwDOAMm_X85Ab9DL 7147 closed 0 Include variable name in message if `decode_cf_variable` raises an error 6628425 - [x] Closes #7145 - [x] Tests added - [x] User visible changes (including notable bug fixes) are documented in `whats-new.rst` I'm not sure if there is a better way to do this, but this is one way to address #7145. The error message for the example now looks like: ``` >>> xr.decode_cf(ds) Traceback (most recent call last): File "/Users/spencer/software/xarray/xarray/coding/times.py", line 275, in decode_cf_datetime dates = _decode_datetime_with_pandas(flat_num_dates, units, calendar) File "/Users/spencer/software/xarray/xarray/coding/times.py", line 210, in _decode_datetime_with_pandas raise OutOfBoundsDatetime( pandas._libs.tslibs.np_datetime.OutOfBoundsDatetime: Cannot decode times from a non-standard calendar, 'noleap', using pandas. During handling of the above exception, another exception occurred: Traceback (most recent call last): File "/Users/spencer/software/xarray/xarray/coding/times.py", line 180, in _decode_cf_datetime_dtype result = decode_cf_datetime(example_value, units, calendar, use_cftime) File "/Users/spencer/software/xarray/xarray/coding/times.py", line 277, in decode_cf_datetime dates = _decode_datetime_with_cftime( File "/Users/spencer/software/xarray/xarray/coding/times.py", line 202, in _decode_datetime_with_cftime cftime.num2date(num_dates, units, calendar, only_use_cftime_datetimes=True) File "src/cftime/_cftime.pyx", line 605, in cftime._cftime.num2date File "src/cftime/_cftime.pyx", line 404, in cftime._cftime.cast_to_int OverflowError: time values outside range of 64 bit signed integers During handling of the above exception, another exception occurred: Traceback (most recent call last): File "/Users/spencer/software/xarray/xarray/conventions.py", line 523, in decode_cf_variables new_vars[k] = decode_cf_variable( File "/Users/spencer/software/xarray/xarray/conventions.py", line 369, in decode_cf_variable var = times.CFDatetimeCoder(use_cftime=use_cftime).decode(var, name=name) File "/Users/spencer/software/xarray/xarray/coding/times.py", line 688, in decode dtype = _decode_cf_datetime_dtype(data, units, calendar, self.use_cftime) File "/Users/spencer/software/xarray/xarray/coding/times.py", line 190, in _decode_cf_datetime_dtype raise ValueError(msg) ValueError: unable to decode time units 'days since 0001-01-01' with "calendar 'noleap'". Try opening your dataset with decode_times=False or installing cftime if it is not installed. During handling of the above exception, another exception occurred: Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/Users/spencer/software/xarray/xarray/conventions.py", line 659, in decode_cf vars, attrs, coord_names = decode_cf_variables( File "/Users/spencer/software/xarray/xarray/conventions.py", line 534, in decode_cf_variables raise type(e)(f"Failed to decode variable {k!r}: {e}") ValueError: Failed to decode variable 'invalid_times': unable to decode time units 'days since 0001-01-01' with "calendar 'noleap'". Try opening your dataset with decode_times=False or installing cftime if it is not installed. ``` 2022-10-08T17:53:23Z 2022-10-12T16:24:45Z 2022-10-12T15:25:42Z 2022-10-12T15:25:42Z 96db9f804cf6bb3ed5e333237b69cb7c47b527e3     0 d2e2b7f93ac18513c23c4c45796cd7c5c63743d9 9f390f50718ee94237084cbc1badb66f9a8083d6 MEMBER   13221727 https://github.com/pydata/xarray/pull/7147  

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