To better understand the use of these widget methods, we'll build a simple application that uses after() and update() to keep the UI responsive during a long-running task.
This is our initial application:
import tkinter as tk from time import sleep class App(tk.Tk): def __init__(self): super().__init__() self.status = tk.StringVar() tk.Label(self, textvariable=self.status).pack() tk.Button(self, text="Run Process", command=self.run_process).pack() def run_process(self): self.status.set("Starting process") for phase in range(1, 5): self.status.set(f"Phase {phase}") self.process_phase(phase, 2) self.status.set('Complete') def process_phase(self, n, length): # some kind of heavy processing ...
