Traceback (most recent call last):
File “C:\Users\adela\PycharmProjects\Dashboard1\genFiles.py”, line 89, in callback_a
eFile = value + ex
TypeError: unsupported operand type(s) for +: ‘NoneType’ and ‘str’
Above I’m creating one string (eFile) from two others (value and ex). How to stop it from doing this?