如何禁用Tkinter Entry组件的键盘输入，仅通过按钮操作？

我编写了一段Tkinter代码，创建了Entry输入框和数字操作按钮，希望仅通过按钮向Entry输入内容，禁止通过键盘输入，但找不到实现方法。以下是我的代码：

import tkinter as tk
from tkinter import *

root = tk.Tk()
yazı = ' '
root.state('zoomed')
root.resizable(False, False)
root.configure(bg='gray95')
labelsayfa = Entry(root, text='', width=28, font='Calibri 15', bg='dark gray')
c1 = Canvas(width=700, height=650, bg='dark gray')
c1.place(x=415, y=60)

def b1g():
    labelsayfa.insert(len(str(labelsayfa)), 1)

def b2g():
    labelsayfa.insert(len(str(labelsayfa)), 2)

def b3g():
    labelsayfa.insert(len(str(labelsayfa)), 3)

def b4g():
    labelsayfa.insert(len(str(labelsayfa)), 4)

def b5g():
    labelsayfa.insert(len(str(labelsayfa)), 5)

def b6g():
    labelsayfa.insert(len(str(labelsayfa)), 6)

def b7g():
    labelsayfa.insert(len(str(labelsayfa)), 7)

def b8g():
    labelsayfa.insert(len(str(labelsayfa)), 8)

def b9g():
    labelsayfa.insert(len(str(labelsayfa)), 9)

def b0g():
    labelsayfa.insert(len(str(labelsayfa)), 10)

def bacg():
    labelsayfa.delete(0, END)

def bsilg():
    labelsayfa.delete(len(labelsayfa.get()) - 1, END)

def bokg():
    pass

b1 = tk.Button(root, text='1', width=10, height=5, command=b1g)
b2 = tk.Button(root, text='2', width=10, height=5, command=b2g)
b3 = tk.Button(root, text='3', width=10, height=5, command=b3g)
b4 = tk.Button(root, text='4', width=10, height=5, command=b4g)
b5 = tk.Button(root, text='5', width=10, height=5, command=b5g)
b6 = tk.Button(root, text='6', width=10, height=5, command=b6g)
b7 = tk.Button(root, text='7', width=10, height=5, command=b7g)
b8 = tk.Button(root, text='8', width=10, height=5, command=b8g)
b9 = tk.Button(root, text='9', width=10, height=5, command=b9g)
b0 = tk.Button(root, text='0', width=10, height=5, command=b0g)
bac = tk.Button(root, text='AC', width=10, height=5, command=bacg)
bsil = tk.Button(root, text='<--', width=10, height=5, command=bsilg)
bok = tk.Button(root, text='✓', width=39, height=2, command=bokg)

def tag():
    c1.place_forget()

    labelsayfa.place(x=1200, y=100)
    bac.place(x=1200, y=160)
    b1.place(x=1300, y=160)
    b2.place(x=1400, y=160)
    b3.place(x=1200, y=260)
    b4.place(x=1300, y=260)
    b5.place(x=1400, y=260)
    b6.place(x=1200, y=360)
    b7.place(x=1300, y=360)
    b8.place(x=1400, y=360)
    b9.place(x=1200, y=460)
    b0.place(x=1300, y=460)
    bsil.place(x=1400, y=460)
    bok.place(x=1200, y=560)

tag()
root.mainloop()

有两种简洁有效的方法实现仅允许按钮操作Entry、禁止键盘输入的需求：

方法1：绑定键盘事件拦截输入 #

给Entry组件绑定<Key>事件，让事件处理函数返回False，直接阻断所有键盘输入动作，同时不影响按钮通过代码修改Entry内容：

# 在创建labelsayfa后添加这行代码
labelsayfa.bind("<Key>", lambda e: False)

方法2：使用验证函数精准控制 #

通过Entry的validate和validatecommand选项，设置仅允许程序内部修改（比如按钮调用insert/delete），拒绝用户键盘输入：

# 先定义验证函数
def validate_input(action):
    # action为'0'表示程序内部修改，'1'表示用户键盘输入
    return action == '0'

# 创建Entry时配置验证规则
labelsayfa = Entry(root, text='', width=28, font='Calibri 15', bg='dark gray',
                   validate='key', validatecommand=(root.register(validate_input), '%d'))

额外代码修正 #

原代码存在两处小问题，建议一并修正：

1. b0g函数插入的是10，但按钮显示0，应改为插入0
2. 插入内容时用END替代len(str(labelsayfa))，更简洁准确

import tkinter as tk
from tkinter import *

root = tk.Tk()
yazı = ' '
root.state('zoomed')
root.resizable(False, False)
root.configure(bg='gray95')

# 方法1：绑定键盘事件拦截输入（二选一即可）
labelsayfa = Entry(root, text='', width=28, font='Calibri 15', bg='dark gray')
labelsayfa.bind("<Key>", lambda e: False)

# # 方法2：使用验证函数（二选一即可）
# def validate_input(action):
#     return action == '0'
# labelsayfa = Entry(root, text='', width=28, font='Calibri 15', bg='dark gray',
#                    validate='key', validatecommand=(root.register(validate_input), '%d'))

c1 = Canvas(width=700, height=650, bg='dark gray')
c1.place(x=415, y=60)

def b1g():
    labelsayfa.insert(END, 1)

def b2g():
    labelsayfa.insert(END, 2)

def b3g():
    labelsayfa.insert(END, 3)

def b4g():
    labelsayfa.insert(END, 4)

def b5g():
    labelsayfa.insert(END, 5)

def b6g():
    labelsayfa.insert(END, 6)

def b7g():
    labelsayfa.insert(END, 7)

def b8g():
    labelsayfa.insert(END, 8)

def b9g():
    labelsayfa.insert(END, 9)

def b0g():
    labelsayfa.insert(END, 0)  # 修正：插入0而非10

def bacg():
    labelsayfa.delete(0, END)

def bsilg():
    # 增加判断，避免空内容时报错
    if len(labelsayfa.get()) > 0:
        labelsayfa.delete(len(labelsayfa.get()) - 1, END)

def bokg():
    pass

b1 = tk.Button(root, text='1', width=10, height=5, command=b1g)
b2 = tk.Button(root, text='2', width=10, height=5, command=b2g)
b3 = tk.Button(root, text='3', width=10, height=5, command=b3g)
b4 = tk.Button(root, text='4', width=10, height=5, command=b4g)
b5 = tk.Button(root, text='5', width=10, height=5, command=b5g)
b6 = tk.Button(root, text='6', width=10, height=5, command=b6g)
b7 = tk.Button(root, text='7', width=10, height=5, command=b7g)
b8 = tk.Button(root, text='8', width=10, height=5, command=b8g)
b9 = tk.Button(root, text='9', width=10, height=5, command=b9g)
b0 = tk.Button(root, text='0', width=10, height=5, command=b0g)
bac = tk.Button(root, text='AC', width=10, height=5, command=bacg)
bsil = tk.Button(root, text='<--', width=10, height=5, command=bsilg)
bok = tk.Button(root, text='✓', width=39, height=2, command=bokg)

def tag():
    c1.place_forget()

    labelsayfa.place(x=1200, y=100)
    bac.place(x=1200, y=160)
    b1.place(x=1300, y=160)
    b2.place(x=1400, y=160)
    b3.place(x=1200, y=260)
    b4.place(x=1300, y=260)
    b5.place(x=1400, y=260)
    b6.place(x=1200, y=360)
    b7.place(x=1300, y=360)
    b8.place(x=1400, y=360)
    b9.place(x=1200, y=460)
    b0.place(x=1300, y=460)
    bsil.place(x=1400, y=460)
    bok.place(x=1200, y=560)

tag()
root.mainloop()

内容的提问来源于stack exchange，提问作者Mehmet Kılınçkaya