在写入时更新Tkinter文本小部件,而不是在类完成后更新

import tkinter as tk

class App:
    def __init__(self, master):
        self.master = master
        self.text = tk.Text(master)
        self.text.pack()
        self.update_text()

    def update_text(self):
        self.text.delete(1.0, tk.END)
        self.text.insert(tk.END, "Hello, world!")
        self.master.after(1000, self.update_text)

root = tk.Tk()
app = App(root)
root.mainloop()

import tkinter as tk

class App:
    def __init__(self, master):
        self.master = master
        self.text = tk.Text(master)
        self.text.pack()

    def update_text(self, text):
        self.text.delete(1.0, tk.END)
        self.text.insert(tk.END, text)

root = tk.Tk()
app = App(root)

text_to_write = "Hello, world!"
for char in text_to_write:
    app.update_text(char)
    root.update()
    # 在这里可以添加暂停时间，以便在写入时可以看到文本小部件的更新
    # time.sleep(0.1)

root.mainloop()