ZEPPELIN-1325: WIP - Python, advanced interpreter impl

[bzz]

What is this PR for?

This is different implementation of Python interpreter that communicates to external Python 2/3 process (not just REPL) though RPC.

It aims for rich feature set, missing in current implementation:

• better error handling
• PEP-8 syntax compatibility
• code-completion
• job progress/cancellation.
• windows support

What type of PR is it?

Improvement

TODOs

• Initial PoC
• add %python2.dep interpreter impl
• install default python dependencies automatically
• update grpc version to 1.0 to make it python3 compatible
• make sure it works on windows
• change ambiguous name/package python2 to something better, like python-remote or python-rich or something else
• update bin_licenses/LICENSE

What is the Jira issue?

ZEPPELIN-1325

How should this be tested?

Bind Python2 (name will be changed) interpreter and run any python code i.e ZEPPELIN-1133

Questions:

• Does the licenses files need update? Yes
• Is there breaking changes for older versions? No
• Does this needs documentation? May be

[zjffdu]

@bzz What the status of this PR ? Do you plan to put it in 0.8 ? Because I think python become more popular with the boom of data science and deep learning, so it would be better to for zeppelin improve the python interpreter.

[zjffdu]

ping @bzz Any updates ?