Tkinter Mainloop Greyed Out In VS Code

May 11, 2022

I made wordle, but I want to make it look more like the official wordle so my goal is to make 5 tkinter entries on every line, and have them feed into each other. When I run this code, mainloop at the bottom is greyed out and no window appears.


root = Tk()
root.geometry('400x400')

def testlen():
    global textinentry1
    textinentry1= entry1.get()
    if len(textinentry1)  >1 :
        entry2.delete(0, END)
        entry2.insert(0,textinentry1[1] )

     

entry1 = Entry(root,width=22,  font = ('Georgia 18'), justify=CENTER)
entry1.grid(row=0, column=0)
entry2 = Entry(root, width=22,  font = ('Georgia 18'), justify=CENTER)
entry2.grid(row=2, column=0)
entry3 = Entry(root, width = 22,font = ('Georgia 18'), justify=CENTER)
entry3.grid(row=4, column=0)

while True:
    testlen()

        
root.mainloop()

What did I do wrong?

>Solution :

The mainloop is executed after while loop end Which is never end this is because you are not seeing the window here.

If you want to run this code then you can use the root.after() method to create a loop.

from tkinter import *
root = Tk()
root.geometry('400x400')

def testlen():
    global textinentry1
    textinentry1= entry1.get()
    if len(textinentry1)  >1 :
        entry2.delete(0, END)
        entry2.insert(0,textinentry1[1] )

     

entry1 = Entry(root,width=22,  font = ('Georgia 18'), justify=CENTER)
entry1.grid(row=0, column=0)
entry2 = Entry(root, width=22,  font = ('Georgia 18'), justify=CENTER)
entry1button = Button(root, text="Enter", command = lambda :testlen())
entry1button.grid(row=1, column=0)
entry2.grid(row=2, column=0)
entry3 = Entry(root, width = 22,font = ('Georgia 18'), justify=CENTER)
entry3.grid(row=4, column=0)
def loop():
    testlen()
    root.after(1,loop) # 1 is 1 millisecond. Here root.after method call the loop function after 1 millisecond without crashing your code.
loop()

root.mainloop()