issues: 1406633320

What happened?

I'm running into an issue when trying to directly use the DataArray.reduce method:

At first I used DataArray.cumsum to see the expected behavior: ```

data = np.arange(12).reshape(4,3) da = xr.DataArray(data=data, dims=['x', 'y'], coords={'x': [10, 20, 30, 40], 'y': [70, 80, 90]}) da.cumsum(dim='x') <xarray.DataArray (x: 4, y: 3)> array([[ 0, 1, 2], [ 3, 5, 7], [ 9, 12, 15], [18, 22, 26]]) Coordinates: * x (x) int64 10 20 30 40 * y (y) int64 70 80 90 `` but when I'm trying to achieve the same result throughDataArray.reduce` I'm running into a numpy error, see code snippet and error traceback for details.

What did you expect to happen?

I expect to get the same output I got from calling DataArray.cumsum: <xarray.DataArray (x: 4, y: 3)> array([[ 0, 1, 2], [ 3, 5, 7], [ 9, 12, 15], [18, 22, 26]]) Coordinates: * x (x) int64 10 20 30 40 * y (y) int64 70 80 90

Minimal Complete Verifiable Example

```Python import xarray as xr import numpy as np

data = np.arange(12).reshape(4,3) da = xr.DataArray(data=data, dims=['x', 'y'], coords={'x': [10, 20, 30, 40], 'y': [70, 80, 90]}) func = xr.DataArray.cumsum da.reduce(func=func, dim='x') ```

MVCE confirmation

• [X] Minimal example — the example is as focused as reasonably possible to demonstrate the underlying issue in xarray.
• [X] Complete example — the example is self-contained, including all data and the text of any traceback.
• [ ] Verifiable example — the example copy & pastes into an IPython prompt or Binder notebook, returning the result.
• [X] New issue — a search of GitHub Issues suggests this is not a duplicate.

Relevant log output

Python Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/mnt/c/Users/GoMaN/Desktop/GoMaN/Projects/xarray/xarray/core/dataarray.py", line 3442, in reduce var = self.variable.reduce(func, dim, axis, keep_attrs, keepdims, **kwargs) File "/mnt/c/Users/GoMaN/Desktop/GoMaN/Projects/xarray/xarray/core/variable.py", line 1883, in reduce data = func(self.data, axis=axis, **kwargs) File "/mnt/c/Users/GoMaN/Desktop/GoMaN/Projects/xarray/xarray/core/common.py", line 63, in wrapped_func return self.reduce( AttributeError: 'numpy.ndarray' object has no attribute 'reduce'

Anything else we need to know?

No response

Environment

C:\Users\GoMaN\miniconda3\envs\xarray-tests3.9\lib\site-packages\_distutils_hack\__init__.py:33: UserWarning: Setuptools is replacing distutils. warnings.warn("Setuptools is replacing distutils.") INSTALLED VERSIONS ------------------ commit: f460357a9246f093d9f7a02693e577c307b0839a python: 3.9.13 | packaged by conda-forge | (main, May 27 2022, 16:51:29) [MSC v.1929 64 bit (AMD64)] python-bits: 64 OS: Windows OS-release: 10 machine: AMD64 processor: Intel64 Family 6 Model 69 Stepping 1, GenuineIntel byteorder: little LC_ALL: None LANG: None LOCALE: ('English_United States', '1252') libhdf5: None libnetcdf: None xarray: 0.1.dev4331+gb33ad6d.d20221005 pandas: 1.5.0 numpy: 1.23.3 scipy: 1.9.1 netCDF4: None pydap: None h5netcdf: None h5py: None Nio: None zarr: None cftime: None nc_time_axis: None PseudoNetCDF: None rasterio: None cfgrib: None iris: None bottleneck: None dask: None distributed: None matplotlib: None cartopy: None seaborn: None numbagg: None fsspec: None cupy: None pint: None sparse: None flox: None numpy_groupies: None setuptools: 65.4.1 pip: 22.2.2 conda: None pytest: 7.1.3 IPython: None sphinx: None