Running code¶

Two ways to run a script against the viewer. Both work without breakpoints — for stepping through a model with the debugger, see Visual debugging.

1. Use Run without debugging¶

Run the file as usual with VS Code's Run Without Debugging (Ctrl-F5) or the Run Python File button. The script runs top to bottom in a fresh process, and every show(...) / show_all() call it reaches updates the viewer. This is the simplest loop: edit, run, look — the viewer keeps camera position and tree selection across runs, so re-running a script does not throw away your view.

2. Use Jupyter notebook mode¶

For an interactive workflow, use the Jupyter extension with # %% cell markers:

Make # %% the first line to initiate the Jupyter environment, then run cells with the "Run cell" button or shift-enter (run and move to next) / ctrl-enter (run and stay). Unlike option 1, state survives between cell runs — a common setup is one import cell at the top and show(...) / show_all() calls in the working cells. See the config system for the set_defaults pattern that usually goes with it.