在 Tkinter 中按下按钮后如何清除 Entry 小部件? [英] How to clear the Entry widget after a button is pressed in Tkinter?

问题描述

我正在尝试在用户使用 Tkinter 按下按钮后清除 Entry 小部件.

I'm trying to clear the Entry widget after the user presses a button using Tkinter.

我尝试使用 ent.delete(0, END)，但我收到错误消息，指出字符串没有 delete 属性.

I tried using ent.delete(0, END), but I got an error saying that strings don't have the attribute delete.

这是我的代码，我在 real.delete(0, END) 上遇到错误:

Here is my code, where I'm getting error on real.delete(0, END):

secret = randrange(1,100)
print(secret)
def res(real, secret):
    if secret==eval(real):
        showinfo(message='that is right!')
    real.delete(0, END)

def guess():
    ge = Tk()
    ge.title('guessing game')

    Label(ge, text="what is your guess:").pack(side=TOP)

    ent = Entry(ge)
    ent.pack(side=TOP)

    btn=Button(ge, text="Enter", command=lambda: res(ent.get(),secret))
    btn.pack(side=LEFT)

    ge.mainloop()

推荐答案

经过Tkinter 简介，我想出了下面的代码，除了显示文本字段并在按下 清除文本" 按钮时清除它外，它什么也不做:

After poking around a bit through the Introduction to Tkinter, I came up with the code below, which doesn't do anything except display a text field and clear it when the "Clear text" button is pushed:

import tkinter as tk

class App(tk.Frame):
    def __init__(self, master):
        tk.Frame.__init__(self, master, height=42, width=42)
        self.entry = tk.Entry(self)
        self.entry.focus()
        self.entry.pack()
        self.clear_button = tk.Button(self, text="Clear text", command=self.clear_text)
        self.clear_button.pack()

    def clear_text(self):
        self.entry.delete(0, 'end')

def main():
    root = tk.Tk()
    App(root).pack(expand=True, fill='both')
    root.mainloop()

if __name__ == "__main__":
    main()

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