[Jython-users] Problem with imports

[Sébastien B. <seb...@te...>]

    Hi all,

I have currently a problem with imports I do not understand.
This is what happens (Jython 2.7.0, java 1.8.0u66, on debian 8):

----8< ---- 8< ----
./jython.sh
Jython 2.7.0 (default:9987c746f838, Apr 29 2015, 02:25:11) 
[Java HotSpot(TM) 64-Bit Server VM (Oracle Corporation)] on java1.8.0_66
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys; sys.path
['', '/path/to/XMCDA-java.jar', '/home/bigaret/lang/python/Lib', '/home/bigaret/lang/python/jython-standalone-2.7.0.jar/Lib', '__classpath__', '__pyclasspath__/']
>>> import org.xmcda.parsers.xml   # this one fails here....
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: No module named xmcda
>>> from org.xmcda.parsers.xml.xmcda_3_0 import XMCDAParser
>>> import org.xmcda.parsers.xml   # ...but now it succeeds
>>> org.xmcda.parsers.xml
<java package org.xmcda.parsers.xml 0x2>
>>> sys.path
['', '/path/to/XMCDA-java.jar', '/home/bigaret/lang/python/Lib', '/home/bigaret/lang/python/jython-standalone-2.7.0.jar/Lib', '__classpath__', '__pyclasspath__/']
----8< ---- 8< ----


Note that the first import fails, while the last (which is the same statement) succeeds --and sys.path was untouched, there is just an import between the two identical imports)

Does someone has any hint why I get such a strange behaviour, or can point me to the right documentation to read? I could unfortunately not find any hint on such peculiarities when searching in jython's doc or on the web in general.

Thanks in advance,

__ Sébastien.


NB: The jython.sh is a simple bash script:

----8< ---- 8< ----
#! /bin/bash
JAVA=/usr/local/java8/bin/java
JYTHON_STANDALONE_JAR=/home/bigaret/lang/python/jython-standalone-2.7.0.jar
XMCDA_LIB="/path/to/XMCDA-java.jar"

export JYTHONPATH="${XMCDA_LIB}"

"${JAVA}" -cp "${JYTHON_STANDALONE_JAR}" org.python.util.jython
----8< ---- 8< ----

(and I have the same behaviour when adding XMCDA_LIB to the java '-cp' argument.

-- 
Sébastien Bigaret
Institut Mines-Télécom - Télécom Bretagne (Département LUSSI)
CNRS - UMR 6285 Lab-STICC (Pôle CID - Équipe DECIDE)
Technopôle Brest-Iroise - CS 83818 - 29238 Brest Cedex 3 - France
Tél. +33 (0)2 29 00 14 22