Hello, I met a annoying problem that the IDLE always creates a black dot when I press backspace and I can't delete it. does any smart guy know how to solve the problem ?

Question

e.mccormick · Answer

I do not know why it would do a siplay artifact like that.  I have never seein it do so.  Does it show up on a screen shot of it?

anonymous · Answer

when I try to run my program, the error says there are several unexpected indented block. I think they are induced by the "black dot"....it looks like this....|dw:1378245980823:dw|