[x3d-public] jupyter notebook
Andreas Plesch
andreasplesch at gmail.com
Thu May 23 14:34:53 PDT 2019
Hi John,
the mybinder notebooks are not permanent. Saving only works for one session.
The .toFileX_ITE() generated html has too much styling to be useful for
jupyter.
But just manually creating the proper minimal HTML, similar to x3dom, works
better, after generating the x3d as file in the docker instance.
Unfortunately, the html served in the HTML display does not use the local
home as root, so it is not possible to just point to the x3d file as a
relative url.
I added a couple of attempt to use x_ite to the jupyter notebook here:
https://mybinder.org/v2/gh/andreasplesch/conda/master/?urlpath=lab/tree/sphere.ipynb
but had to give up.
x_ite works in an iframe with a accessible, remote url but does not work
with a local url, in jupyterlab on mybinder. Perhaps it works on a local
install.
Maybe I will try and see if textures and inlines work in x3dom on jupyter.
Cheers, Andreas
On Wed, May 22, 2019 at 11:37 AM John Carlson <yottzumm at gmail.com> wrote:
>
> I welcome feedback on this X_ITE version, in a second notebook in your
binder. I merely stepped into the XML output 140 characters to arrive at
something I could put between X3DCanvas tags.
>
>
>
> I’m not sure if this link will get you there, but it got me there. I
think the notebook is titled x_ite_sphere.ipynb.
>
> https://hub.mybinder.org/user/andreasplesch-conda-vpb30a9r/lab
>
>
>
> Needs debugged. I don’t quite know what’s missing, looks like shaders.
See console log.
>
>
>
> Probably we need a released version?
>
>
>
> Twitter keeps the first 140 characters, and we drop them. Heh!
>
>
>
> All the more reason to pass parameters or provide alternative functions.
>
>
>
> John
>
>
>
> Sent from Mail for Windows 10
>
>
>
> From: Andreas Plesch
> Sent: Wednesday, May 22, 2019 7:08 AM
> To: John Carlson
> Cc: X3D Graphics public mailing list
> Subject: Re: [x3d-public] jupyter notebook
>
>
>
> Hi John,
>
>
>
> X_ITE needs an additional X3DCanvas element wrapper:
>
>
>
> http://create3000.de/x_ite/getting-started/
>
>
>
> And the x3d in a file.
>
>
>
> You could write the xml to a file in jupyter with python. But then the
>
> file probably also needs to be served by a HTTP server. Since jupyter
>
> is already served (even locally) to allow for the web interface,
>
> perhaps it works to just point to the file as a relative url, as in
>
> the example on the x_ite web page.
>
>
>
> With my x_ite_dom js bridge, it may work the same as with x3dom.
>
>
>
> -Andreas
>
>
>
> On Wed, May 22, 2019 at 4:37 AM John Carlson <yottzumm at gmail.com> wrote:
>
> >
>
> > It would be good to test Script nodes in X3DPSAIL output, but I think
that means X_ITE instead of X3DOM.
>
> >
>
> >
>
> >
>
> > Will that be as easy as tacking on different JS and CSS elements?
>
> >
>
> >
>
> >
>
> > John
>
> >
>
> >
>
> >
>
> > Sent from Mail for Windows 10
>
> >
>
> >
>
> >
>
> > From: Andreas Plesch
>
> > Sent: Tuesday, May 21, 2019 3:16 PM
>
> > To: John Carlson
>
> > Cc: X3D Graphics public mailing list
>
> > Subject: Re: [x3d-public] jupyter notebook
>
> >
>
> >
>
> >
>
> > I learned a little more about jupyterlab and mybinder.org.
>
> >
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> >
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> >
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> >
https://mybinder.org/v2/gh/andreasplesch/conda/master/?urlpath=lab/tree/sphere.ipynb
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> >
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> >
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> >
>
> > gives you now the full jupyterlab interface. I also added a second
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> >
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> > scene which is modified from the first scene by using a global
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> >
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> > material cell.
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> >
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> >
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> >
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> > I was also thinking about animation, eg. updating an existing output
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> >
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> > but this seems to be not a very common jupyter notebook mode anyways.
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> >
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> >
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> >
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> > But it would be a challenging next step to have an python interface to
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> >
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> > the generated DOM, or the live content in a X3D browser for true scene
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> >
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> > access.
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> >
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> >
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> >
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> > For the way mybinder works with cached docker images on the server,
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> >
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> > the jar size may not be that critical. It all stays on the server. It
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> >
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> > just may take little longer to pull the prebuild docker image onto the
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> >
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> > server but the image is probably pretty large anyways.
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> >
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> >
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> >
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> > It still feels pretty heavy to have to use a 40MB jar plus pyjnius.
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> >
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> >
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> >
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> > Unfortunately, I am not familiar with anaconda packages. I guess the
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> >
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> > target is a package with Pyjnius as an (automatic?) dependency, which
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> >
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> > includes X3DJSAIL.jar and the autoclass generation python. Anaconda
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> >
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> > has channels, so if conda-forge does not accept such a package, one
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> >
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> > could perhaps find another channel or make one.
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> >
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> >
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> >
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> > Let me see, I saw somewhere an example on how to include a jar in a
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> >
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> > conda package ...
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> >
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> >
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> >
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> > https://github.com/conda-forge/conda-forge.github.io/issues/590 is
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> >
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> > what you tried, and you got a recommendation.
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> >
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> >
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> >
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> > Looks like https://pypi.org/project/scyjava/ is the way to go.
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> >
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> >
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> >
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> > https://github.com/andreasplesch/conda was just a quick way to try
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> >
>
> > mybinder.org since that works with github repos. I learned that
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> >
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> > Mybinder.org is an instance of a BinderHub which can be created
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> >
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> > anywhere. Binder is mostly about automatically creating docker images
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> >
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> > for jupyterlab with any additional requirements/software necessary. So
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> >
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> > one could just have a local BinderHub.
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> >
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> >
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> >
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> > "My" docker image boils down to just providing a simple
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> >
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> > environment.yml (which just specifies pyjnius as a required conda
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> >
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> > package) and X3DJSAIL in a place where it can be found (root). For any
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> >
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> > other python notebook it is likely that other conda packages are
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> >
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> > required in addition, although I think the default docker image
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> >
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> > already has the most popular ones preconfigured.
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> >
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> >
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> >
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> > One can just clone the repo, and go from there.
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> >
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> >
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> > Looking up how to generate conda packages:
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> >
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> >
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> >
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> > https://conda.io/projects/conda-build/en/latest/concepts/recipe.html
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> >
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> > https://github.com/conda/conda-recipes
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> >
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> >
https://conda.io/projects/conda-build/en/latest/resources/define-metadata.html
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> >
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> >
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> >
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> > conda-forge has its own system on top of recipes:
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> >
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> >
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> >
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> >
https://conda-forge.org/docs/maintainer/updating_pkgs.html#maintaining-pkgs
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> >
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> > https://github.com/conda-forge/pyjnius-feedstock
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> >
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> >
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> >
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> > There would need to be a maintainer.
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> >
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> > -Andreas
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> >
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> > On Tue, May 21, 2019 at 2:05 PM John Carlson <yottzumm at gmail.com> wrote:
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> >
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> > >
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> >
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> > > Yeah, that jar in the X3DJSAIL repo is ancient, and not kept
up-to-date.
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> >
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> > >
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> > > The one here is 2 months old:
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> > > https://github.com/coderextreme/pythonSAI
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> >
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> > >
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> > >
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> > >
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> >
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> > > You can build your own X3DJSAIL with this repository, if you like
something simple:
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> >
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> > >
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> > > https://github.com/coderextreme/JavaSceneAuthoringInterfaceLibrary
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> >
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> > >
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> > >
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> >
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> > >
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> > > But it’s not a “fat” jar. For that, you need Don’s build of the full
jar below, or from Don’s X3DJSAIL web page.
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> >
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> > >
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> > >
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> > >
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> > > Otherwise, you have to use the ant target create.X3DJSAIL in
www.web3d.org/x3d/stylesheets/ (sourceforge download). Jars are found in
java/jars below that.
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> >
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> > >
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> > >
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> > > I’ve been seduced by the dark-side, Don and X3DJSAIL, and have not
been maintaining my projects. X3DPSAIL is a happy medium, and now thanks
to you, a nearly publishable medium.
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> >
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> > >
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> > >
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> > >
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> > > Are you by chance, working on a Anaconda package so we can import
x3dpsail (the first script on your page) into jupyter? I have a way to
generate python application scripts (second script on page) with leading
x3dpsail. in front of the constructor calls. This is to reduce namespace
pollution. Do we just need to install
https://github.com/andreasplesch/conda? Could you provide instructions on
how to install into our own docker or jupyter enviroments? Looks like
https://mybinder.org/ leads the way. Or do you want to support everyone’s
development with your docker? …could get kind of crowded. I think the
best solution is to create a conda package for x3dpysail which includes the
python and the jar. I saw one issue on it, but it was VERY long, and
closed, so I assume there’s documentation on how to include a jar in a
conda package somewhere, just not sure where yet.
>
> >
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> > >
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> > > John
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> > > Sent from Mail for Windows 10
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> >
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> > >
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> >
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> > >
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> >
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> > >
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> >
>
> > > From: Andreas Plesch
>
> >
>
> > > Sent: Tuesday, May 21, 2019 11:10 AM
>
> >
>
> > > To: John Carlson
>
> >
>
> > > Cc: X3D Graphics public mailing list
>
> >
>
> > > Subject: Re: [x3d-public] jupyter notebook
>
> >
>
> > >
>
> >
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> > >
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> >
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> > >
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> >
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> > > Hi John,
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> >
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> > >
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> >
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> > >
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> >
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> > >
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> >
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> > > thanks for the quick response. I had provided an older X3DJSAIL.jar
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> >
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> > >
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> >
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> > > from https://github.com/coderextreme/X3DJSAIL which had the advantage
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> > >
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> > > of being small.
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> > >
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> > > Now, that I found the more up to date
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> > >
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> > > http://www.web3d.org/specifications/java/jars/X3DJSAIL.3.3.full.jar
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> >
>
> > >
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> >
>
> > > and use that instead, things start to work (!). [Most links to the jar
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> >
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> > >
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> >
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> > > on the page need to be updated].
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> >
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> > >
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> >
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> > >
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> >
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> > >
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> >
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> > > Try again, the same link:
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> >
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> > >
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> >
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> > >
https://mybinder.org/v2/gh/andreasplesch/conda/master?filepath=sphere.ipynb
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> >
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> > >
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> > > The errors are gone when you execute the cells.
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> > > The generated xml looks good.
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> > >
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> >
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> > >
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> > >
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> >
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> > > But the IPython.display HTML function does not display anything. Does
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> > >
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> >
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> > > that work locally for you ? HTML(data='<h1>Title</h1>') works. Maybe
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> >
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> > >
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> >
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> > > an iframe is necessary.
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> > >
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> > > -Andreas
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> > > On Tue, May 21, 2019 at 11:20 AM John Carlson <yottzumm at gmail.com>
wrote:
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> >
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> > >
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> >
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> > > >
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> >
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> > >
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> >
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> > > > Hi Andreas.
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> > > > Summary: I don’t think the X3DJSAIL .jar was found in .
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> > > > I tried a very similar script to yours, putting the jar in the home
folder. I suspect that you don’t have access to your home folder, or the
jar was uploaded as unreadable. Once I put my X3DJSAIL.3.3.full.jar in my
local environment home, the classpath started working.
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> > > > I tried without the jar in place, and got similar issues with
PointProperties.
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> > > > I tried running your remote jupyter and got similar results.
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> > > > I suspect readability issues or something configured with your
classpath/jar.
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> > > > We need to get the jar into the x3dpsail conda package, I think.
An unsolved problem.
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> > > > It should run okay with a local anaconda. I realize you want to
run remote. We understand, and will attempt to deliver a conda package in
the next month or so.
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> > > > If you would like to help, we’re working on creating an x3dpsail
package which includes all dependencies. We have the start of a pip
package, but so far, it won’t upload. A Jupyter conda package is probably
more acceptable to most people.
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> > > > It might be instructive to issue the first script with a single
Java class, to see if it can find one Java class. That will direct you to
the smoking gun. If it can’t load one class, then the classpath isn’t
working.
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> > > > If you set a CLASSPATH environmental variable (java’s classpath) in
your docker image, it might work better, give it a try. I am staying away
from docker for now. Ensure that OpenJDK or similar is deployed with
jnius.
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> > > > Conclusion:
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> > > > X3dpsail has been shown to work with an absolute path or the jar on
a local system. Try to use an absolute path in conda in the short term
(within your sandbox), until we get a conda package for x3dpsail.
>
> >
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> > > > John
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> > > > Sent from Mail for Windows 10
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> > > > From: Andreas Plesch
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> >
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> > >
>
> >
>
> > > > Sent: Tuesday, May 21, 2019 9:22 AM
>
> >
>
> > >
>
> >
>
> > > > To: X3D Graphics public mailing list
>
> >
>
> > >
>
> >
>
> > > > Subject: [x3d-public] jupyter notebook
>
> >
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> > > > Hi John,
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> > > > I was curious and gave Pyjnius+X3DJSAIL.3.3 from your repo a try
with
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>
> >
>
> > > > your sphere.ipynb, using online jupyter with mybinder.org:
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > https://github.com/andreasplesch/conda
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > Use this link
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > >
https://mybinder.org/v2/gh/andreasplesch/conda/master?filepath=sphere.ipynb
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > and wait until the server starts with the mybinder built docker
image
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > (takes a bit).
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > Executing then the first cell with all the autoclass generation does
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > something until there is an error:
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > JavaException Traceback (most recent
call last)
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > <ipython-input-1-149e86182885> in <module>
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > 87 HAnimHumanoid =
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > autoclass('org.web3d.x3d.jsail.HAnim.HAnimHumanoidObject')
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > 88 HAnimJoint =
autoclass('org.web3d.x3d.jsail.HAnim.HAnimJointObject')
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > ---> 89 HAnimMotion =
autoclass('org.web3d.x3d.jsail.HAnim.HAnimMotionObject')
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > 90 HAnimSegment =
autoclass('org.web3d.x3d.jsail.HAnim.HAnimSegmentObject')
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > 91 HAnimSite =
autoclass('org.web3d.x3d.jsail.HAnim.HAnimSiteObject')
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > >
/srv/conda/envs/notebook/lib/python3.7/site-packages/jnius/reflect.py
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > in autoclass(clsname)
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > 157
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > 158 # c = Class.forName(clsname)
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > --> 159 c = find_javaclass(clsname)
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > 160 if c is None:
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > 161 raise Exception('Java class {0} not
found'.format(c))
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > jnius/jnius_export_func.pxi in jnius.find_javaclass()
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > JavaException: Class not found
b'org/web3d/x3d/jsail/HAnim/HAnimMotionObject'
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > The good news is that the online jupyter notebook seems to work in
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > principle, eg. Pyjnius and java is installed, and the
X3DJSAIL.3.3.jar
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > seems to be found as well.
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > Have you seen problems with the HAnimMotion before ?
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > Commenting out HAnimMotion, uncovers similar errors for
PointProperties and X3D.
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > JavaException Traceback (most recent
call last)
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > <ipython-input-1-f7be65079716> in <module>
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > 255 Scene = autoclass('org.web3d.x3d.jsail.Core.SceneObject')
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > 256 unit = autoclass('org.web3d.x3d.jsail.Core.unitObject')
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > --> 257 X3D = autoclass('org.web3d.x3d.jsail.Core.X3DObject')
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > 258 SFBool =
autoclass('org.web3d.x3d.jsail.fields.SFBoolObject')
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > 259 MFBool =
autoclass('org.web3d.x3d.jsail.fields.MFBoolObject')
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > >
/srv/conda/envs/notebook/lib/python3.7/site-packages/jnius/reflect.py
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > in autoclass(clsname)
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > 157
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > 158 # c = Class.forName(clsname)
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > --> 159 c = find_javaclass(clsname)
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > 160 if c is None:
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > 161 raise Exception('Java class {0} not
found'.format(c))
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > jnius/jnius_export_func.pxi in jnius.find_javaclass()
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > JavaException: Class not found b'org/web3d/x3d/jsail/Core/X3DObject'
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > Is there another Pyjnius or X3DJSAIL.jar to try ?
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > Pyjnius is installed with conda and a pyjnius line in
environment.yml.
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > -Andreas
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > --
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > Andreas Plesch
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > Waltham, MA 02453
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > _______________________________________________
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > x3d-public mailing list
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > x3d-public at web3d.org
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > > http://web3d.org/mailman/listinfo/x3d-public_web3d.org
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > > >
>
> >
>
> > >
>
> >
>
> > >
>
> >
>
> > >
>
> >
>
> > >
>
> >
>
> > >
>
> >
>
> > >
>
> >
>
> > >
>
> >
>
> > > --
>
> >
>
> > >
>
> >
>
> > > Andreas Plesch
>
> >
>
> > >
>
> >
>
> > > Waltham, MA 02453
>
> >
>
> > >
>
> >
>
> > >
>
> >
>
> >
>
> >
>
> >
>
> >
>
> >
>
> >
>
> > --
>
> >
>
> > Andreas Plesch
>
> >
>
> > Waltham, MA 02453
>
> >
>
> >
>
>
>
>
>
>
>
> --
>
> Andreas Plesch
>
> Waltham, MA 02453
>
>
--
Andreas Plesch
Waltham, MA 02453
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