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
36211623,MDU6SXNzdWUzNjIxMTYyMw==,167,Unable to load pickle Dataset that was picked with cPickle,2382049,closed,0,1217238,650893,1,2014-06-21T00:02:43Z,2014-06-22T01:40:58Z,2014-06-22T01:40:58Z,NONE,,,,"```
import cPickle as pickle
import xray
import numpy as np
import pandas as pd

foo_values = np.random.RandomState(0).rand(3,4)
times = pd.date_range('2001-02-03', periods=3)
ds = xray.Dataset({'time': ('time', times), 'foo': (['time', 'space'], foo_values)})

with open('mypickle.pkl', 'w') as f:
    pickle.dump(ds, f)

with open('mypickle.pkl') as f:
    myds = pickle.load(f)

myds
```

This code results in:
`<repr(<xray.dataset.Dataset at 0x7f95a3290d90>) failed: AttributeError: mapping>`
","{""url"": ""https://api.github.com/repos/pydata/xarray/issues/167/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,completed,13221727,issue