I have some ERROR

Sometime when i run cell, ít appear (*) icon and i can’t see my output . Can i ask is it error ? tks all

You have a mistake in your code.

After leaving the first while you are running the second one as long as len(line) is greater than 0.
But this is always true, because you don’t decrease the length of the line inside this loop, so the program runs infinitely.

Cells which are still executing are shown with a star inside square brackets.

tks for your suggest…i try to do it. tks very much :grinning: