Thread: Interfering Lines on Python editor (not a coding problem)

hey gang!

decided going try , teach self how program started reading python , dove right in. part going fine. however, when scroll around in editor window these annoying lines appear , block out text (see attached pic). disappear when click on them. absolutely maddening when trying debug. thought might editor using (drpython), tried , same thing started happening. theses lines have never appeared in other application have used.

have ideas?

thanks
brian