issues: 251666172

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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
251666172 MDU6SXNzdWUyNTE2NjYxNzI= 1512 rolling requires pandas >= 0.18 6815844 closed 0   2415632 5 2017-08-21T13:58:59Z 2017-08-31T17:25:10Z 2017-08-31T17:25:10Z MEMBER      

We need pandas >= 0.18 because dataframe.rolling is supported after 0.18. But requirements in our setup.py says we need pandas >= 0.15.

Additionally, I noticed that in travis's CONDA_ENV=py27-min setup, our unit tests run with pandas == 0.20, though it might be intended to run with pandas == 0.15.

By conda remove scipy, pandas.0.15 is removed. (Here is the travis log) ``` if [[ "$CONDA_ENV" == "py27-min" ]]; then conda remove scipy; fi Fetching package metadata ......... Solving package specifications: .

Package plan for package removal in environment /home/travis/miniconda/envs/test_env:

The following packages will be REMOVED:

pandas: 0.15.0-np19py27_0 defaults
scipy:  0.17.1-np19py27_1 defaults

then in `python setup.py install`, pandas==0.20.3 is installed. Searching for pandas>=0.15.0 Reading https://pypi.python.org/simple/pandas/ Downloading https://pypi.python.org/packages/ee/aa/90c06f249cf4408fa75135ad0df7d64c09cf74c9870733862491ed5f3a50/pandas-0.20.3.tar.gz#md5=4df858f28b4bf4fa07d9fbb7f2568173 Best match: pandas 0.20.3 ```

 
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