[Jython-users] painful transition from jpython to jython

[Robert K. <rob...@ya...>]

hi,

i am just now moving from jpython to jython and
i am experiencing some errors by doing that.
maybe somebody can help.

here the context:
i am writing some modules, that help to
generate java-code from a togetherj-modell.
so what i am doing in effect is calling a
java-module from together which again calls
thru the PythonInterpreter my python-modules.

on switching to jython20 i have renamed
my old jpython installation directory to 
jpython.old and installed jython. i renamed
my new jython install-directory to jpython 
and renamed the jython.jar to jpython.jar.
this was all done so that there be no need
to change all the property-files for running
my generator scripts.

after switching to jython the os module can not
be called anymore. i simply can not understand
why this happens.

if i run jython from the dos-prompt and import
the os module it works as expected.

here the first few lines of my main.py (the
module excuting the java-source-code-generator)
>>>
import types
import copy
import string
import traceback

from feidlc2.builder.data import data_generator
from feidlc2.builder.facade.roi import
facade_generator
...
>>>

and here the traceback

>>>
Traceback (innermost last):
  File "<stdin>", line 4, in ?
  File "E:\tools\jpython\Lib\traceback.py", line 3, in
?
  File "E:\tools\jpython\Lib\linecache.py", line 9, in
?
java.lang.ExceptionInInitializerError:
java.lang.NullPointerException
        at org.python.modules.os.<clinit>(os.java:11)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:120)
        at
org.python.core.SyspathJavaLoader.loadClass(SyspathJavaLoader.java:57)
        at
java.lang.ClassLoader.loadClass(ClassLoader.java:253)
        at org.python.core.Py.findClassEx(Py.java:607)
        at
org.python.core.imp.loadBuiltin(imp.java:198)
        at org.python.core.imp.load(imp.java:354)
        at org.python.core.imp.load(imp.java:376)
        at
org.python.core.imp.importName(imp.java:447)
        at
org.python.core.imp.importName(imp.java:509)
        at
org.python.core.ImportFunction.load(__builtin__.java:967)
        at
org.python.core.ImportFunction.__call__(__builtin__.java:961)
        at
org.python.core.PyObject.__call__(PyObject.java:250)
        at
org.python.core.__builtin__.__import__(__builtin__.java:921)
        at org.python.core.imp.importOne(imp.java:518)
        at
linecache$py.f$0(E:\tools\jpython\Lib\linecache.py)
        at
linecache$py.call_function(E:\tools\jpython\Lib\linecache.py)
        at
org.python.core.PyTableCode.call(PyTableCode.java:155)
        at
org.python.core.imp.createFromCode(imp.java:157)
        at
org.python.core.imp.createFromPyClass(imp.java:74)
        at
org.python.core.imp.loadFromPath(imp.java:310)
        at
org.python.core.imp.loadFromPath(imp.java:252)
        at org.python.core.imp.load(imp.java:357)
        at org.python.core.imp.load(imp.java:376)
        at
org.python.core.imp.importName(imp.java:447)
        at
org.python.core.imp.importName(imp.java:509)
        at
org.python.core.ImportFunction.load(__builtin__.java:967)
        at
org.python.core.ImportFunction.__call__(__builtin__.java:961)
        at
org.python.core.PyObject.__call__(PyObject.java:250)
        at
org.python.core.__builtin__.__import__(__builtin__.java:921)
        at org.python.core.imp.importOne(imp.java:518)
        at
traceback$py.f$0(E:\tools\jpython\Lib\traceback.py)
        at
traceback$py.call_function(E:\tools\jpython\Lib\traceback.py)
        at
org.python.core.PyTableCode.call(PyTableCode.java:155)
        at
org.python.core.imp.createFromCode(imp.java:157)
        at
org.python.core.imp.createFromPyClass(imp.java:74)
        at
org.python.core.imp.loadFromPath(imp.java:310)
        at
org.python.core.imp.loadFromPath(imp.java:252)
        at org.python.core.imp.load(imp.java:357)
        at org.python.core.imp.load(imp.java:376)
        at
org.python.core.imp.importName(imp.java:447)
        at
org.python.core.imp.importName(imp.java:509)
        at
org.python.core.ImportFunction.load(__builtin__.java:967)
        at
org.python.core.ImportFunction.__call__(__builtin__.java:961)
        at
org.python.core.PyObject.__call__(PyObject.java:250)
        at
org.python.core.__builtin__.__import__(__builtin__.java:921)
        at org.python.core.imp.importOne(imp.java:518)
        at org.python.pycode._pyx0.f$0(<stdin>)
        at
org.python.pycode._pyx0.call_function(<stdin>)
        at
org.python.core.PyTableCode.call(PyTableCode.java:155)
        at org.python.core.Py.runCode(Py.java:1055)
        at
org.python.util.PythonInterpreter.execfile(PythonInterpreter.java:164)
        at
com.togethersoft.modules.fe.GeneratorStart.run(GeneratorStart.java:29)
        at zaqb.invokeScript([DashoPro-V1.2-120198])
        at zbn0.b([DashoPro-V1.2-120198])
        at zaqh.execute([DashoPro-V1.2-120198])
        at
com.togethersoft.component.query.DefaultContext.execute(DefaultContext.java:26)
        at
zb48.actionPerformed([DashoPro-V1.2-120198])
        at zclp.execute([DashoPro-V1.2-120198])
        at zagw.run([DashoPro-V1.2-120198])

java.lang.ExceptionInInitializerError:
java.lang.ExceptionInInitializerError
>>>

=====
itemj
http://www.itemj.com
Robert Kuzelj          mobil 0177  5302230
Ramonvillestr.6        tel   06039 930223
61184 Karben           fax   06039 2224

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