insert text for textbox tkinter python

Question

from tkinter import *
from tkinter import ttk
import tkinter as tk
import time
class __MENU__(tk.Tk):
    def insert_(self):
        while True:
            self.text_box.insert('end','hi\n')
            time.sleep(1)
    def __init__(self):
        tk.Tk.__init__(self)
        self.geometry('700x350')
        self.title('AUTO-TDS')
        frame=ttk.Frame(self)
        self.text_box=Text(frame,height=13,width=30,wrap='word')
        #self.text_box.insert('end','Auto Trao Đổi Sub v1\n')
        self.text_box.pack(side=LEFT,expand=True)
        sb=ttk.Scrollbar(frame)
        sb.pack(side=RIGHT, fill=BOTH)
        self.text_box.config(yscrollcommand=sb.set)
        sb.config(command=self.text_box.yview)
        frame.pack(expand=True)
        self.bnt=ttk.Button(self,text='start',command=self.insert_).place(x=500,y=300)
        
if __name__=='__main__':
    __MENU__().mainloop()

when i press start my interface is unresponsive , I want to use while loop to print continuously, how to do?

Use .after() instead of while loop and time.sleep().

acw1668
– acw1668

2021-07-30 04:01:28 +00:00
Commented Jul 30, 2021 at 4:01 — acw1668
– acw1668, Commented Jul 30, 2021 at 4:01

score 2 · Accepted Answer · 2021-07-30 04:17:00Z

2

Loops mess with mainloop. Use .after(). Your while loop will keep going on for ever because condition is always True.

def insert_(self):
      self.text_box.insert('end','hi\n')
      self.after(1000,self.insert_)

If you want to use while loop., use threading module.

from tkinter import *
from tkinter import ttk
import tkinter as tk
import time,threading
class __MENU__(tk.Tk):
    def insert_(self):
        while True:
            self.text_box.insert('end','hi\n')
            time.sleep(1)
    def insert_text(self):
        x=threading.Thread(target=self.insert_)
        x.daemon = True
        x.start()
    def __init__(self):
        tk.Tk.__init__(self)
        ....
        self.bnt=ttk.Button(self,text='start',command=self.insert_text).place(x=500,y=300)
       
if __name__=='__main__':
    __MENU__().mainloop()

edited Jul 30, 2021 at 4:17

answered Jul 30, 2021 at 4:01

user15801675

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6 Comments

Nguyễn Phú Khương Over a year ago

I am required to use while . loop

Nguyễn Phú Khương Over a year ago

is there any other way?

Nguyễn Phú Khương Over a year ago

def insert_(self): self.text_box.insert('end','hi\n') self.after(1000,self.insert_) def start(self): while True: self.insert_

user15801675 Over a year ago

@NguyễnPhúKhương, check my updated answer

Bryan Oakley Over a year ago

@NguyễnPhúKhương: why are you required to use a while loop? That's almost always the wrong solution in a GUI program.

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