I wonder if someone could point me in the right direction please below is a small example of a press me app. Once pressed the app displays text to a Tkinter label. My issue is as the button is pressed the GUI fills up with multiple lines of the label. How would one just make the label appear just the once no matter how many times the button is clicked.
Thank you
import tkinter as tk
def testapp():
w = tk.Label(root, text="Hello again!")
w.pack()
root = tk.Tk()
w = tk.Button(root, text="Press Me!",command=testapp)
w.pack()
root.mainloop()
CodePudding user response:
import tkinter as tk
global_label = None
def testapp():
global global_label
if not global_label:
global_label = tk.Label(root, text="Hello again!")
global_label.pack()
root = tk.Tk()
w = tk.Button(root, text="Press Me!", command=testapp)
w.pack()
root.mainloop()