Exception in Tkinter callback
Traceback (most recent call last):
File "tkinter__init.py", line 1705, in call__
return self.func(*args)
File "NST_GUI.py", line 141, in on_closing
if messagebox.askokcancel("Quit", "Do you want to quit?"):
NameError: name 'messagebox' is not defined
Fix this minor issue.
Exception in Tkinter callback Traceback (most recent call last): File "tkinter__init.py", line 1705, in call__ return self.func(*args) File "NST_GUI.py", line 141, in on_closing if messagebox.askokcancel("Quit", "Do you want to quit?"): NameError: name 'messagebox' is not defined