issues: 269143043

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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
269143043 MDU6SXNzdWUyNjkxNDMwNDM= 1663 ds.notnull() fails with AttributeError on pandas 0.21.0rc1 500246 closed 0     8 2017-10-27T15:19:33Z 2017-11-01T05:27:18Z 2017-11-01T05:27:18Z CONTRIBUTOR      

xarray.Dataset({"A": ("x", arange(5))}).notnull() fails with an 'AttributeError' when using numpy 1.13.3, xarray 0.9.6, and pandas 0.21.0rc1. The AttributeError is raised by pandas; see below.

``` $ cat mwe.py

!/usr/bin/env python3.6

import numpy print(numpy.version) import xarray print(xarray.version) import pandas print(pandas.version)

xarray.Dataset({"A": ("x", numpy.arange(5))}).notnull() $ ./mwe.py 1.13.3 0.9.6 0.21.0rc1 Traceback (most recent call last): File "/dev/shm/gerrit/venv/stable-3.6/lib/python3.6/site-packages/xarray/core/ops.py", line 193, in func return getattr(self, name)(args, *kwargs) AttributeError: 'Variable' object has no attribute 'notna'

During handling of the above exception, another exception occurred:

Traceback (most recent call last): File "./mwe.py", line 10, in <module> xarray.Dataset({"A": ("x", numpy.arange(5))}).notnull() File "/dev/shm/gerrit/venv/stable-3.6/lib/python3.6/site-packages/xarray/core/dataset.py", line 2485, in func ds._variables[k] = f(self._variables[k], args, kwargs) File "/dev/shm/gerrit/venv/stable-3.6/lib/python3.6/site-packages/xarray/core/ops.py", line 195, in func return f(self, args, **kwargs) File "/dev/shm/gerrit/venv/stable-3.6/lib/python3.6/site-packages/pandas/core/dtypes/missing.py", line 212, in notna res = isna(obj) File "/dev/shm/gerrit/venv/stable-3.6/lib/python3.6/site-packages/pandas/core/dtypes/missing.py", line 45, in isna return _isna(obj) File "/dev/shm/gerrit/venv/stable-3.6/lib/python3.6/site-packages/pandas/core/dtypes/missing.py", line 60, in _isna_new return obj._constructor(obj._data.isna(func=isna)) AttributeError: 'Variable' object has no attribute '_constructor' ```

 
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   completed 13221727 issue

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