openscad crashes on mac when opening .py files

[ffavero]

Describe the bug

After installing OpenScad and having python3.12 functional and correctly installed in the system, openscad crash when open a python source file

To Reproduce
Steps to reproduce the behavior:

1. Download OpenScad from https://pythonscad.org/
2. install python via homebrew "brew install python@3.12"
3. Open a .py file
4. See error

Expected behavior
this fork of OpenScad should open .py files

Code reproducing the issue
If applicable, add trimmed down, self-contained code demonstrating the issue.

/Applications/OpenSCAD.app/Contents/MacOS/OpenSCAD     
qt.qpa.fonts: Populating font family aliases took 59 ms. Replace uses of missing font family "Open Sans" with one that exists to avoid this cost. 
Could not find platform independent libraries <prefix>
Could not find platform dependent libraries <exec_prefix>
Python path configuration:
  PYTHONHOME = (not set)
  PYTHONPATH = '/Applications/OpenSCAD.app/Contents/MacOS/../libraries/python/:.'
  program name = 'python3'
  isolated = 0
  environment = 1
  user site = 1
  safe_path = 0
  import site = 1
  is in build tree = 0
  stdlib dir = '/usr/local/lib/python3.12'
  sys._base_executable = '/Applications/OpenSCAD.app/Contents/MacOS/OpenSCAD'
  sys.base_prefix = '/usr/local'
  sys.base_exec_prefix = '/usr/local'
  sys.platlibdir = 'lib'
  sys.executable = '/Applications/OpenSCAD.app/Contents/MacOS/OpenSCAD'
  sys.prefix = '/usr/local'
  sys.exec_prefix = '/usr/local'
  sys.path = [
    '/Applications/OpenSCAD.app/Contents/libraries/python',
    '/Users/ffra/src/my_thing',
    '/usr/local/lib/python312.zip',
    '/usr/local/lib/python3.12',
    '/usr/local/lib/python3.12/lib-dynload',
  ]
FALLBACK (log once): Fallback to SW vertex for line stipple
FALLBACK (log once): Fallback to SW vertex processing, m_disable_code: 2000
FALLBACK (log once): Fallback to SW vertex processing in drawCore, m_disable_code: 2000
Fatal Python error: PyImport_AppendInittab: PyImport_AppendInittab() may not be called after Py_Initialize()
Python runtime state: core initialized
ModuleNotFoundError: No module named 'encodings'

Current thread 0x00000001ef40cf40 (most recent call first):
  <no Python frame>
zsh: abort      /Applications/OpenSCAD.app/Contents/MacOS/OpenSCAD

Environment and Version info (please complete the following information):

• OS: macOS 14.6.1
• System: arm64
• OpenSCAD Version 2024.08.08 from https://pythonscad.org/

Additional context

The issue seems that the python path needs to be in a specific location. I've tried to symlink the installed python in varous places to make it use the correct one, but it probably can't find it. It would be nice if we could specify a version of the python path to use in some setting panel

[gsohler]

Thank you for your bug report. its in a very great place here.
Now I will try to find out, where python loads its files in my working pythonscad installation.

[gsohler]

My PythonSCAD installation works when i either dont set PYTHONHOME or when i set it to /usr/local.
Anything else crashes

I believe the PythonSCAD DMG file requires python 3.12.4 installed into /usr/local
Could you try to download compile and install it into there ?

[hedbug]

I have a similar issue. I have an empty .py file, which OpenSCAD loads fine, but as soon as I type anything (even just a carriage return) into the window then OpenSCAD crashes. It loads and edits .scad files fine.

I've got brew to install python 3.12, which it put in "/usr/local/opt/python@3.12/libexec/bin" (as I've no idea how to tell it where to put it) and I've created a symbolic link in /usr/local, and I can run python fine by doing, e.g. :

/usr/local/python -- version , which gives 3.12.7.

"which python" gives /usr/local/bin/python, so I've made sure that is now a symbolic link to the brew version as well.

But still I get the crash.

My PYTHONPATH is empty.

p.s. is OpenSCAD calling "python" or "python3" as currently "python3" is still 3.7.3 as I've not created links for that.

[hedbug]

I believe the PythonSCAD DMG file requires python 3.12.4 installed into /usr/local

How do you mean exactly... I have it in
/usr/local/bin/python3.12 (for the binary)
/usr/local/lib/python3.12/site-packages/ (for the packages)

Or should the be installed directly into usr/local (without the /bin or /lib) ?

[gsohler]

Nope, With Python-3.12.4 i mean downloading its source and compile it in your system. This has best chance to be installed exact the same way as in my apple you can type : wget https://www.python.org/ftp/python/3.12.4/Python-3.12.4.tgz tar xvfz Python-3.12.4.tgz cd Python-3.12.14 ./configure make sudo make install This procedure should not take too long and it leaves hardly any ambiguity not to be the same installation as in my mac. I am interested in having it running in mac, too, even though mac is not my primary computer .

…

On Sun, Oct 20, 2024 at 5:10 PM hedbug ***@***.***> wrote: I believe the PythonSCAD DMG file requires python 3.12.4 installed into /usr/local How do you mean exactly... I have it in /usr/local/bin/python3.12 (for the binary) /usr/local/lib/python3.12/site-packages/ (for the packages) Or should the be installed directly into usr/local (without the /bin or /lib) ? — Reply to this email directly, view it on GitHub <#33 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ACCO4MTWKRBKHBC6XZRUB5DZ4PBXTAVCNFSM6AAAAABNT4LI7WVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDIMRVGAZTMMBWGQ> . You are receiving this because you commented.Message ID: ***@***.***>

[hedbug]

Thanks gsohler, it's taken me a while to get working (Ihad to uninstall and reinstall brew to get Python to build properly), but I've just managed to get it built and installed, and now OpenSCAD is running python.

[hedbug]

p.s. would it be possible for you to put an newer version of OpenSCAD with python on the download page for MacOS on Apple Silicon? The version that is there is a little out of date (2024.08.08), and I'm having some issues with it, and I'm wondering if these are fixed in a newer version. I have tried building it all from source, but after a couple of hours attempting it, I'm still having build errors...

The issues with the 2024.08.08 version that I'm seeing are when running the tutorials on this page: https://pythonscad.org/tutorial/site/combining_objects/

Anything of the form:
fusion = cu.union(cy)

Fails with AttributeError: 'PyOpenSCAD' object has no attribute 'union'

But anything of the following form works fine:
fusion = union([cu, cy])

The same holds true for other functions such as difference(), however right, down, rotz seem to work fine, so the following works fine:

result = cu.right(1).down(2) # directions are right, left, front, back, up, down

[gsohler]

i have created a new apple silicon release as of 2024-11-05
Anybody could test it if it works outside of Eden ?

[hedbug]

Hi gsohler, many thanks for doing a new release. Sadly the same issues (e.g. fusion = cu.union(cy) ) remain in this version, but I can still work around these using the other form ( fusion = union([cu, cy]) ) that does work ok.

Anybody could test it if it works outside of Eden ?

I don't know what Eden is, I assume some kind of virtual machine, but I have just vanilla MacOS 15.0.1 so yes, I can confirm that this apple silicon release works outside of Eden. Many thanks.

[gsohler]

Hi hedbug,

1st of all thank you for testing!

Just now I have created a testcase exaclty with your code and it appears to work with the latest source code.

Which version does it show in Help->About ?

Sorry for writing strange things about Eden. I was refering the the place where adam and eve lived and all was still ok
(like my compilation environment)

Can you please check if my code works on the latest DMG file(from 11-04, i think) ?

from openscad import *
cy=cylinder(r=1,h=5)
cu=cube(3)
fusion = cu.union(cy)
fusion.show()

thx again!

[hedbug]

Hi gsohler, many apologies, I think I made a typo in the code when I retested on the latest version (I put fusion instead of union, which of course failed as that function doesn't exist). I think it all works fine now for version 11.04. Thank you for creating the new version, and for checking!

[gsohler]

Hi hedbug, Also nice ! But the most exciting fact is that i am now able to create MAC DMG files, which work in another place latest version also have splines as primitives, which helps to create organic shapes I'd be glad if you could quickly document for others, who you installed your python3.12 thx again!

…

On Thu, Nov 7, 2024 at 4:40 PM hedbug ***@***.***> wrote: Hi gsohler, many apologies, I think I made a typo in the code when I retested on the latest version (I put fusion instead of union, which of course failed as that function doesn't exist). I think it all works fine now for version 11.04. Thank you for creating the new version, and for checking! — Reply to this email directly, view it on GitHub <#33 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ACCO4MW4FIBENFG4POICV5LZ7OCVDAVCNFSM6AAAAABNT4LI7WVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDINRSGU2TMMZZGM> . You are receiving this because you commented.Message ID: ***@***.***>

[jonjelinek]

For people that don't want to build and install python from scratch and instead would like to stick with homebrew for their package management, the steps below worked for me.

First make sure you have python 3.12 installed via brew. It's fine to have newer versions of python installed via brew, but you need 3.12 for PythonSCAD

brew install python@3.12

Download and install PythonSCAD to your Applications. I chose to replace my previous OpenSCAD install with this version.

For people on Apple Silicon the file I installed was https://www.pythonscad.org/downloads/OpenSCAD-silicon-2024-11-05.dmg

Test that PythonSCAD runs and does not crash when 'Preview' is clicked.

PYTHONHOME=$(dirname $(dirname $(realpath $(which python3.12)))) ~/Applications/OpenSCAD.app/Contents/MacOS/OpenSCAD test.py

If the above works for you, permanently set your PYTHONHOME in .bashrc or .bash_profile or .zshrc file by adding the following line toward the bottom of the file

export PYTHONHOME=$(dirname $(dirname $(realpath $(which python3.12))))

OR if you don't want to permanently have your python home set to 3.12, simply add a line aliasing openscad

alias openscad='PYTHONHOME=$(dirname $(dirname $(realpath $(which python3.12)))) ~/Applications/OpenSCAD.app/Contents/MacOS/OpenSCAD'

Now restart your terminal and try it out using: openscad test.py

[gsohler]

can this be closed ?

[linuxdan]

For people on Apple Silicon the file I installed was https://www.pythonscad.org/downloads/OpenSCAD-silicon-2024-11-05.dmg

What about for folks like me that are still on Apple Intel ?