Trying to build a python application using tkinter and ttk Sun Valley theme using pyinstaller, the finished build would throw errors unable to find the tcl file and related theme data. Pyinstaller does a pretty good job finding and including related python files and modules, but it doesn't do so well with other assets and this theme uses other assets.
The brute force method is just to include the tcl file and theme resources manually when building the program.
pyinstaller --onefile --noconsole --add-data "<path to python modules>\Lib\site-packages\sv_ttk\sv.tcl;sv_ttk\" --add-data "<path to python modules>\Lib\site-packages\sv_ttk\theme\*;sv_ttk\theme" .\main.py
This should produce the bundled application with the resource files all embedded where the scripts expect to find them.