Am 07.05.2015 um 22:29 schrieb Raymond Gong:
Hi Joachim,
Thanks a lot for your nice response. Actually I am doing this, I just
replied to Ondrej's message on this, but I didn't run Jython testing
against sympy, I even don't know how to do it,
could you provide some more information or link on this?
My approach to installing Jython (no doubt biased by my other Python
workflows) would be (all done from the shell):
- Use pythonz to download Jython
- Use virtualenv to install it into a project directory
(so the pythonz download stays unaltered for future experiments)
- Use virtualenv to activate the Jython install
- cd to the sympy directory and do the normal bin/isympy.
This should install Jython and give you a first smoke test whether SymPy
is even able to start under Jython. If it doesn't, report the error
messages in whatever the bug tracker has for Jython and try some other
approach (unless the messages indicate very easily solved issues: the
SymPy project may consider officially supporting Jython if it turns out
to be little work to keep it that way).
Now if isympy can start, Ctrl-D out of isympy and try bin/test.
If that reports no errors, or errors only for modules that don't
interest you anyway, Jython is a viable path.
(Oh. If your project needs to remain executable in the future, you'll
also want that the SymPy project officially supports Jython.)
Once this all is done, I'd start exploring how to call into Python code
from Java.
Calling SymPy functions should be easy: They are all available in the
"sympy" module. I.e. if you see "exp()" somewhere, it will be available
as "sympy.exp()". You do not need to worry which module defines a
specific function; actually, those that do not make it into the "sympy"
module are not part of SymPy's public API and might go away in future
SymPy releases (you can still use them if you're willing to take the
risk, Python allows you to override all access restrictions at will).
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