[Jython-bugs] [issue1776] Packages in JARs that are dynamically added to sys.path cannot be imported

[Dominik J. <re...@bu...>]

New submission from Dominik Jain <dj...@gm...>:

Adding a JAR file to the classpath by appending its location to sys.path does not make the packages contained in the JAR available.

I thought this was related to #1455, which was supposedly fixed, but it doesn't work. In Jython 2.2, if somelib.jar was located in /path/to/somelib.jar and contained the package somepackage, one could do the following:

import sys
sys.path.append("/path/to/somelib.jar")
import somepackage

This will not work in either Jython 2.5.1 or 2.5.2 (somepackage is not available). 
However, if the class files are not in a JAR but in a directory, e.g. /path/to/somebin, it will also work with the two new releases:

import sys
sys.path.append("/path/to/somebin")
import somepackage

Works fine. 

You can try this with any JAR. So far I haven't found one I could import with 2.5.1/2.5.2.

Because the issue breaks backward compatibility with Jython 2.2 and I am unaware of an equally simple way of dynamically loading JARs, I consider this to be critical.

----------
components: Core
messages: 6577
nosy: djain
severity: critical
status: open
title: Packages in JARs that are dynamically added to sys.path cannot be imported
type: behaviour
versions: 2.5.1, 2.5.2

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Jython tracker <re...@bu...>
<http://bugs.jython.org/issue1776>
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