Tkinter中Entry组件调用get方法返回.!entry的问题如何修复

问题根源 #

• 执行顺序错误：按钮绑定的回调逻辑先销毁了OTP输入窗口，再尝试读取Entry组件的输入值，窗口销毁后组件已被释放，get()方法无法正常取值，只会返回组件的内部标识字符串.!entry
• Tkinter用法不规范：不要在程序中多次实例化tk.Tk()，次级窗口请用tk.Toplevel()实现，同时原代码中的window_1.destroy缺少括号，没有实际执行销毁操作
• 逻辑阻塞问题：原代码中window_1.mainloop()会阻塞后续代码执行，只有关闭窗口后才会执行两次密码一致性判断，不符合交互逻辑

修复后完整代码 #

from twilio.rest import Client
import random, tkinter as tk

def forgot_p():
    account_sid = 'ACCOUNT_SID'
    auth_token = 'AUTH_TOKEN'
    client = Client(account_sid, auth_token)
    OTP = random.randint(1,1000000)
    # 测试阶段可注释掉twilio调用，直接打印OTP调试
    message = client.messages.create(body=str(OTP), from_='+18888888888', to='+19999999999')
    print(f"调试OTP：{OTP}")

    window = tk.Tk()
    label = tk.Label(text='Please enter your OTP')
    opt_num = tk.Entry()
    # 调整执行顺序：先读取输入再销毁窗口
    def check_and_destroy():
        input_otp = opt_num.get()
        window.destroy()
        try:
            input_otp = int(input_otp)
        except:
            print("OTP格式非法")
            return
        if input_otp == OTP:
            new_password()
        else:
            print('OTP校验失败')

    button = tk.Button(text='Check OTP', command=check_and_destroy)
    label.pack()
    opt_num.pack()
    button.pack()
    window.mainloop()

def new_password():
    window_1 = tk.Toplevel()
    label_1 = tk.Label(window_1, text='Please enter your new password twice')
    text = tk.Entry(window_1, show='*')
    text_1 = tk.Entry(window_1, show='*')
    
    def check_pwd():
        p1 = text.get()
        p2 = text_1.get()
        if p1 == p2 and p1.strip():
            print('password changed')
            window_1.destroy()
        else:
            tk.Label(window_1, text='两次输入不一致，请重新输入', fg='red').pack()

    submit_btn = tk.Button(window_1, text='提交', command=check_pwd)
    label_1.pack()
    text.pack()
    text_1.pack()
    submit_btn.pack()

if __name__ == "__main__":
    forgot_p()

内容的提问来源于stack exchange，提问作者lalith guthula