[x3d-public] x3d.py package: Some feedback and suggestion for improvement; tuples and lists; updated x3d.py

Sat Mar 5 18:08:55 PST 2022

Thanks Moritz for looking at this.  However, we can’t really expect any PyPi
user who types “pip install x3d” to go through such a process.

Does latest version work for you? Presumably you are getting the same
problem
 test reports are helpful.

Perhaps my local installation is incorrect
 am just using stock latest
python installer from python.org.  I will do a complete uninstall/reinstall
of python 3.10.latest.

Our goal is simplicity.  Still trying to find right incantation in our
__init__.py for PyPi.

all the best, Don

-- 

Don Brutzman  Naval Postgraduate School, Code USW/Br        brutzman at nps.edu

Watkins 270,  MOVES Institute, Monterey CA 93943-5000 USA    +1.831.656.2149

X3D graphics, virtual worlds, Navy robotics https://
faculty.nps.edu/brutzman

From: Hans Moritz Guenther <hgunther at mit.edu> 
Sent: Friday, March 4, 2022 11:17 AM
To: Brutzman, Donald (Don) (CIV) <brutzman at nps.edu>; vmarchetti at kshell.com;
X3D-Public <x3d-public at web3d.org>
Cc: John Carlson <yottzumm at gmail.com>; Peitso, Loren (CIV)
<lepeitso at nps.edu>
Subject: Re: [x3d-public] x3d.py package: Some feedback and suggestion for
improvement; tuples and lists; updated x3d.py

On 3/1/22 10:31 PM, Brutzman, Donald (Don) (CIV) wrote:

5.   Bad news, still no joy.  Following “pip install x3d” and hiding
PYTHONPATH, the PyPi version installed via pip still fails, now saying:

IT160907-UWALPP+brutzman at IT160907-UWALPP
/cygdrive/c/x3d-code/www.web3d.org/x3d/content/examples/X3dForWebAuthors/Cha
pter02GeometryPrimitives

$ python BoxExample.py

Traceback (most recent call last):

  File "C:\x3d-code\
<http://www.web3d.org/x3d/content/examples/X3dForWebAuthors/Chapter02Geometr
yPrimitives/BoxExample.py>
www.web3d.org\x3d\content\examples\X3dForWebAuthors\Chapter02GeometryPrimiti
ves\BoxExample.py", line 23, in <module>

    import x3d

ModuleNotFoundError: No module named 'x3d'

That means that it's simply not finding the location where it's been
installed to. Depending on how your Python is installed (provided by your
operating system, conda, complied by hand yourself) it may be set up to look
at different locations by default.

> pip show x3d

(after running pip) should show you where the files went. How does Python
know where to look? Again, that depends on how it was installed. Usually,
that's the same place where pip installed stuff, but apparently that's not
the case here. Maybe the pip is not the same one as the Python. That can
happen when there are several Python version installed on the same system,
e.g. one is installed using conda and one is provided by the operating
system.

Typically, they are in the same location:

(base) MoritzAirRoseGold ~> which pip
/Users/guenther/mambaforge/bin/pip
(base) MoritzAirRoseGold ~> which python
/Users/guenther/mambaforge/bin/python

In that case, pip will install to a directory that python looks into when
using "import".

If instead, the package is installed at a different location, then
PYTHONPATH should be set to the base directory of the packages, i.e. if you
have packages:

/my/dir/x3d

/my/dir/otherpackage1

/my/dir/otherpacakge2

then PYTHONPATH=/my/dir

not "/my/dir/x3d" (because that way python would look for
/my/dir/x3d/x3d/__init__.py, so one level of x3d too many).

Moritz

-- 
Hans Moritz Günther
Massachusetts Institute of Technology
Kavli Institute for Astrophysics and Space Research
77 Massachusetts Avenue
NE83-569
Cambridge, MA 02139
hgunther at mit.edu <mailto:hgunther at mit.edu> 
https://space.mit.edu/home/guenther/
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