How can i avoid Tkinter GUI freezing in Python3?

Question

I am quite new in python and made a Tkinter application that will execute all python files existing in the directory when pressed the start button. My GUI also has progressbar to see the current progress.

so here is my code

import os
from tkinter import *
from tkinter.ttk import *
from tkinter import messagebox

directory = dir_path = os.path.dirname(os.path.realpath(__file__))

files = os.listdir(directory)


root = Tk()
root.geometry('200x200')
root.maxsize(200,200)
root.minsize(200,200)
root.title('PYTOEXE')

v = 0
def begin():
    global v
    for x in files:
        os.system('pyinstaller '+x)
        v=v+1
        p['value']=v


p = Progressbar(root,length=200,max=len(files))

b = Button(root,text="Start",command=lambda: begin())



p.place(x=0,y=0)
b.place(x=62,y=30)

root.mainloop()

but my problem is, Whenever i press start button, The GUI freezes and codes start getting compiled and when completed, the GUI unfreezes and the Progressbar fills itself full at once...

So i want the GUI not to freeze while processing and show correct progress on the Progressbar.

Example code and Explanation will be better for me.

Thanks for your valuable time...

jizhihaoSAMA jizhihaoSAMA · Accepted Answer · 2020-04-04T12:00:24

This worked.No need to use .after() to check the thread is finished.

import os
from tkinter import *
from tkinter.ttk import *
import threading

def use_pyinstaller(): # this function is to execute pyinstaller command and add value to progressbar.
    v = 0
    for x in files:
        os.system('pyinstaller '+x)
        v+=1
        p['value'] = v

def begin():
    threading.Thread(target=use_pyinstaller).start() # create a non-block thread to start the function.

directory = dir_path = os.path.dirname(os.path.realpath(__file__))
files = os.listdir(directory)
root = Tk()
root.geometry('200x200')
root.maxsize(200,200)
root.minsize(200,200)
root.title('PYTOEXE')

p = Progressbar(root,length=200,max=len(files))
b = Button(root,text="Start",command=begin)

p.place(x=0,y=0)
b.place(x=62,y=30)

root.mainloop()

How can i avoid Tkinter GUI freezing in Python3?

2 Answers