displays "Please type in an integer" if user tries to type something else, but user can leave incorrect info in table. if that incorrect info is an empty cell (user deleted default 0 but didn't type anything else) or a space, the error message that pops up "invalid literal for int() with base 10: '' " can be confusing to user, especially with dark grey highlighted cells.
displays "Please type in an integer" if user tries to type something else, but user can leave incorrect info in table. if that incorrect info is an empty cell (user deleted default 0 but didn't type anything else) or a space, the error message that pops up "invalid literal for int() with base 10: '' " can be confusing to user, especially with dark grey highlighted cells.
from Patrick's email:
recreated: