Does that LOC count include dependencies?
Anyway, I wouldn't count the kind of simple, focused libraries dependencies Widdler relies on as additional LOC.
As a rule of thumb, if it's something that wouldn't make me blink an eye if I found it was in the python stdlib, it gets a pass from me. Only the webdav library might not fit this.
This is subjective, of course. If anyone has a better heuristic for this, I'm all ears.
The only external dependency is OpenBSD specific and used on that operating system only.