GitHub user zjffdu reopened a pull request:

    https://github.com/apache/zeppelin/pull/1839

    [WIP] ZEPPELIN-1903. ZeppelinContext can not display pandas DataFrame in 
PySparkInterpreter

    ### What is this PR for?
    I copy some code from `PythonInterpreter` to `PySparkInterpreter` to enable 
display pandas DataFrame in `PySparkInterpreter`. Ideally IMO all the features 
in PythonInterpreter should be available in `PySparkInterpeter`. 
`PySparkInterpreter` should be an extension of PythonInterpreter.  After 
refactoring of PythonInterpreter is done, we can consider about it.
    
    
    ### What type of PR is it?
    [Improvement]
    
    ### Todos
    * [ ] - Task
    
    ### What is the Jira issue?
    * https://issues.apache.org/jira/browse/ZEPPELIN-1903
    
    ### How should this be tested?
    Unit test is added and also manually tested. 
    
    ### Screenshots (if appropriate)
    
![image](https://cloud.githubusercontent.com/assets/164491/21637701/17a68a22-d2a3-11e6-9a5c-4ec2183b5951.png)
    
    ### Questions:
    * Does the licenses files need update? No
    * Is there breaking changes for older versions? No
    * Does this needs documentation? No


You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/zjffdu/zeppelin ZEPPELIN-1903

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/zeppelin/pull/1839.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #1839
    
----
commit e6c4df41c33c0d3b9f8987d362fa881a157383ec
Author: Jeff Zhang <zjf...@apache.org>
Date:   2017-01-04T09:21:46Z

    ZEPPELIN-1903. ZeppelinContext can not display pandas DataFrame in 
PySparkInterpreter

commit 1ee3c60401903b8dc36954d27d925bdd48aef161
Author: Jeff Zhang <zjf...@apache.org>
Date:   2017-01-05T02:54:32Z

    install pandas in travis

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