Re: [Jython-users] hook into nfldb with PythonInterpreter?

[Stefan R. <Ste...@gm...>]

Thufir,

there are basically two options, depending how close Java-intergation of the API you need.

-If you have only a specific use-case you can use PythonInterpreter to execute python-code
that performs the desired operation. PythonInterpreter-API also allows you to retrieve values
for further processing in Java.

-If you'd like to have Java-API-like access to a Python-API (e.g. that of nfldb), you need to
write a Java-interface that acts like a header to that Python-API, adding Java
type-information to it. So far you can only target Python-methods, i.e. no direct field-access.
In Jython 2.7.1b3 or newer, use Py.newJ or PyModule.newJ method family to instanciate Python-
objects under such Java-interface.
Page 45+ of https://arxiv.org/pdf/1607.00825v1.pdf contain examples using that technique (although
these are JyNI examples, the principle is applicable to plain Python-code as well).
Prior to 2.7.1b3 you would need to write glue-code in Python, that extends your Java-interface.
See http://www.jython.org/jythonbook/en/1.0/JythonAndJavaIntegration.html#using-jython-within-java-applications
for further example, especially the approach with glue-code.

Given you mention JNI, I wouldn't see how that could help here. nfldb seems to contain no C-part.

Feel free to ask again in more detail if you stuck on either approach.

Best

Stefan


> Gesendet: Sonntag, 15. Januar 2017 um 18:45 Uhr
> Von: "Thufir Hawat" <haw...@gm...>
> An: Jyt...@li...
> Betreff: [Jython-users] hook into nfldb with PythonInterpreter?
>
> I'm very new to Python and Jython, but installed nfldb from
> 
> pip install --user nfldb
> 
> which is on github:
> 
> https://github.com/BurntSushi/nfldb/wiki/More-examples
> 
> 
> Coming at this from Java, how would I hook into nfldb with Java?  Or,
> perhaps, run the code in Jython?
> 
> I'm sure there's a general solution or approach, would appreciate any
> pointers.  Perhaps simply using JNI to leverage the work that's gone into
> this library already.
> 
> It looks like probably org.python.util.PythonInterpreter is the best way 
> to invoke this library?  I've seen examples of how to invoke a specific 
> script, but this API is a bit larger.  How would I hook into an API?
> 
> 
> 
> 
> thanks,
> 
> Thufir
> 
> 
> 
> 
> 
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