issue_comments: 1383218813

IT supports .conj so we now have a different error: ``` /home/runner/work/xarray/xarray/xarray/tests/test_computation.py:1597:

/home/runner/work/xarray/xarray/xarray/core/computation.py:1300: in cov return _cov_corr(da_a, da_b, dim=dim, ddof=ddof, method="cov") /home/runner/work/xarray/xarray/xarray/core/computation.py:1402: in _cov_corr valid_count = valid_values.sum(dim) - ddof /home/runner/work/xarray/xarray/xarray/core/_aggregations.py:1855: in sum return self.reduce( /home/runner/work/xarray/xarray/xarray/core/dataarray.py:3667: in reduce var = self.variable.reduce(func, dim, axis, keep_attrs, keepdims, **kwargs) /home/runner/work/xarray/xarray/xarray/core/variable.py:1944: in reduce axis = self.get_axis_num(dim) /home/runner/work/xarray/xarray/xarray/core/common.py:215: in get_axis_num return tuple(self._get_axis_num(d) for d in dim) /home/runner/work/xarray/xarray/xarray/core/common.py:215: in <genexpr> return tuple(self._get_axis_num(d) for d in dim)

self = <xarray.Variable (x: 2, time: 2)> array([[ True, True], [ True, True]]) dim = ['time', 'x']

def _get_axis_num(self: Any, dim: Hashable) -> int:
    try:
        return self.dims.index(dim)
    except ValueError:

      raise ValueError(f"{dim!r} not found in array dimensions {self.dims!r}")

E ValueError: ['time', 'x'] not found in array dimensions ('x', 'time')

```