当用户在 tkinter 输入框中没有输入时如何避免错误？

Question

Hi I am trying to get a solution for, if a user enters no value into an entry box, it doesn't create an error. i have tried:

if players_math_answer_var.get() is None or players_math_answer_var.get() == "":
    players_math_answer_var.set(0)

also tried to set the value to 0 when initializing tk variable

[![players_math_answer_var = tk.IntVar(value=0)][1]][1]

But still get this error message (See screen shot)

Answer 1

As I understand you want it to be impossible for errors to occur, so try the try - except statement

try : # do this 
    # .....
except : # if error happened do this 
    # .....