id,node_id,number,title,user,state,locked,assignee,milestone,comments,created_at,updated_at,closed_at,author_association,active_lock_reason,draft,pull_request,body,reactions,performed_via_github_app,state_reason,repo,type
189632049,MDU6SXNzdWUxODk2MzIwNDk=,1125,DataArrayRolling.reduce changes dimensions order,4031219,closed,0,,,3,2016-11-16T08:44:28Z,2017-02-27T17:11:02Z,2017-02-27T17:11:02Z,NONE,,,,"Seems like a bug.
Code to reproduce:
```
import numpy as np
import xarray as xr
arr = xr.DataArray(np.random.rand(3, 3, 100))
rolled = arr.rolling(dim_2=3)
print(rolled.mean().dims)
print(rolled.reduce(np.mean).dims)
```
Output:
```
('dim_0', 'dim_1', 'dim_2')
('dim_2', 'dim_0', 'dim_1')
```

P.S. Package version:
```
$ pip show xarray
---
Metadata-Version: 2.0
Name: xarray
Version: 0.8.2
Summary: N-D labeled arrays and datasets in Python
Home-page: https://github.com/pydata/xarray
Author: xarray Developers
Author-email: xarray@googlegroups.com
Installer: pip
License: Apache
Location: /usr/lib/python3.5/site-packages
Requires: numpy, pandas
Classifiers:
  Development Status :: 4 - Beta
  License :: OSI Approved :: Apache Software License
  Operating System :: OS Independent
  Intended Audience :: Science/Research
  Programming Language :: Python
  Programming Language :: Python :: 2
  Programming Language :: Python :: 2.7
  Programming Language :: Python :: 3
  Programming Language :: Python :: 3.3
  Programming Language :: Python :: 3.4
  Programming Language :: Python :: 3.5
  Topic :: Scientific/Engineering
```","{""url"": ""https://api.github.com/repos/pydata/xarray/issues/1125/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,completed,13221727,issue