Conflicting dependencies in Google Colab demo

[andyyngo]

Blendify Colab demo notebook failed to install dependencies

Step to recreate:

• Open the Colab notebook in README.MD
• Run the first cell. "!pip install blendify trimesh matplotlib"
• Output

Collecting blendify
  Using cached blendify-2.0.1-py3-none-any.whl.metadata (8.0 kB)
Collecting trimesh
  Using cached trimesh-4.8.3-py3-none-any.whl.metadata (18 kB)
Requirement already satisfied: matplotlib in /usr/local/lib/python3.12/dist-packages (3.10.0)
Requirement already satisfied: numpy in /usr/local/lib/python3.12/dist-packages (from blendify) (2.0.2)
Requirement already satisfied: scipy in /usr/local/lib/python3.12/dist-packages (from blendify) (1.16.2)
INFO: pip is looking at multiple versions of blendify to determine which version is compatible with other requirements. This could take a while.
Collecting blendify
  Using cached blendify-2.0.0-py3-none-any.whl.metadata (7.8 kB)
  Using cached blendify-1.2.3-py3-none-any.whl.metadata (6.2 kB)
  Using cached blendify-1.2.2-py3-none-any.whl.metadata (6.2 kB)
  Using cached blendify-1.2.1-py3-none-any.whl.metadata (6.2 kB)
  Using cached blendify-1.2.0-py3-none-any.whl.metadata (7.4 kB)
ERROR: Cannot install blendify==1.2.0, blendify==1.2.1, blendify==1.2.2, blendify==1.2.3, blendify==2.0.0 and blendify==2.0.1 because these package versions have conflicting dependencies.

The conflict is caused by:
    blendify 2.0.1 depends on bpy==3.6.0
    blendify 2.0.0 depends on bpy==3.6.0
    blendify 1.2.3 depends on bpy==3.5.0
    blendify 1.2.2 depends on bpy==3.5.0
    blendify 1.2.1 depends on bpy==3.5.0
    blendify 1.2.0 depends on bpy==3.5.0

To fix this you could try to:
1. loosen the range of package versions you've specified
2. remove package versions to allow pip to attempt to solve the dependency conflict

[ptrvilya]

Hey, thanks for the report!

The reason for this is the conflict between default Python version in Colab (3.12) and Python required for bpy (3.11).

A possible workaround is to use older Colab environment: Edit->Notebook settings->Runtime version->2025.07. It comes with Python 3.11 and should run the demo without issues.

[andyyngo]

Until you can resolve this problem, can you put a small note on README file to caution people?

[andyyngo]

I can test your suggestion and do a PR on your README file if you want

[ptrvilya]

Thanks! I've also tested it myself before replying to you. I will update readme and the notebook itself with the instructions.

Unfortunately the fix is out of my hands as Colab regularly updates Python versions and bpy always has Python version pinned.