Re: [Jython-users] cant import a java class even though it shows via dir

[Brandon P. <bp...@gm...>]

So I was trying different things and I realized that actually doing
sys.path.append(jar_file) doesnt work in this case at all. I actually
was messing around with different things and did
Py.getSystemState().packageManager.addJar(jar_file, True) and it
cached the package (which made it appear that sys.path.append was
working)...

But I guess addJar() doesn't actually help which causes the symptoms
below, so the question still stands, if adding to sys.path does not
work, how else can I import a jar file dynamically?

-Brandon

On Thu, Sep 30, 2010 at 1:21 PM, Brandon Pedersen <bp...@gm...> wrote:
> Hi all,
>
> We are running a somewhat customized version of Jython and I am trying
> to dynamically load a jar from the file system and import a class. I
> do:
>
> sys.path.append(jar_file)
> import com.vmware.vim25.mo.ServiceInstance
>
> This throws an ImportError saying it cannot import the name
> ServiceInstance. However, if I do:
>
> sys.path.append(jar_file)
> import com.vmware.vim25.mo
> print dir(com.vmware.vim25.mo)
>
> It will list ServiceInstance as available....I am thoroughly confused
> as to how this is possible.
>
> I am sure it has to do with how we are running jython since this works
> using a regular jython script, but I am not sure what to look for. Is
> there some property we arent setting when we initialize the jython
> interpreter instance? is there some other way to add the jar or notify
> the package manager of the new jar and process it like it does on
> startup?
>
> I realize this may be a long shot without knowing exactly how we are
> using jython but thanks for any help,
>
> -Brandon
>