I have a very simple script that retrieves the value from a text box upon click
of a checkButton. But in click event, I'm receiving text box object as NoneType
even after setting it as global. Pls help.
Output: !!ERROR!! Tag is None
########### Source Code ###########
from tkinter import *
from tkinter import ttk
import os
def submitData():
global tag
global tagBox
if (tagBox is not None):
tag = tagBox.get("1.0","end-1c")
print ("!!SUCESS!! tag -->", tag)
else:
print ("!!ERROR!! Tag is None")
gui = Tk()
gui.title("GUI")
gui.geometry('250x300')
tag = "NA"
tagBoxLabel = Label(gui, text = "Tag: ").grid(column=0, row=5, pady=30,
sticky="EN")
tagBox = Text(gui, height=1, width=20).grid(column=1, row=5, pady=30,
sticky="WN")
submitButton = ttk.Button(gui, text="Submit", command=lambda:
submitData()).grid(column=1, row=7)
gui.mainloop()
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