输入字段中的python Tkinter get（）值

Question

我在从Tkinter（）条目字段中获取值时感到困惑。我有这样的密码。。。

from Tkinter import*

def valueGET(val1, val2):
    print val1 + "  " + val2

class ContentUI():
def showLogin(self, frame):

        self.contentUI = ContentUI()    

        L1 = Label(frame, text="Name")
        L1.pack( side = LEFT)
        L1.grid()

        E1 = Entry(frame, bd =5)
        E1.pack(side = RIGHT)
        E1.grid()

        L2 = Label(frame, text="Secret")
        L2.pack( side = LEFT)
        L2.grid()       

        E2 = Entry(frame, bd =5, show="*")
        E2.pack(side = RIGHT)
        E2.grid()

        submit = Button(frame, text="Enter", width=15, command=valueGET(E1.get(), E2.get())) 
        submit.grid()

class UIDisplay():
    def play(self):
        root = Tk()

        root.title(title)
        root.geometry(dimension)

        app = Frame(root)

        contentUI = ContentUI()
        contentUI.showLogin(app)

        app.grid()


        root.mainloop()

adkooPlay = UIDisplay()
adkooPlay.play()

但我的value get（val1，val2）方法似乎不起作用，它没有打印值，甚至没有使用Tkinter（）项的get（）方法获取值，我做错了吗？怎么做呢？

提前谢谢。。。

Answer 1

在函数的print命令中需要括号

def valueGET(val1, val2):
    print val1 + "  " + val2

Answer 2

甚至在创建submit按钮之前，代码调用valueGET。然后它将函数的返回值作为command参数传递给按钮构造函数。

要将函数注册为回调，请替换以下行：

submit = Button(frame, text="Enter", width=15, command=valueGET(E1.get(), E2.get())) 

使用：

submit = Button(frame, text="Enter", width=15, command=lambda: valueGET(E1.get(), E2.get())) 

Answer 3

from tkinter import *
import tkinter as tk
root =tk.Tk()
mystring =tk.StringVar(root)
def getvalue():
    print(mystring.get())
e1 = Entry(root,textvariable = mystring,width=100,fg="blue",bd=3,selectbackground='violet').pack()
button1 = tk.Button(root, 
                text='Submit', 
                fg='White', 
                bg= 'dark green',height = 1, width = 10,command=getvalue).pack()

root.mainloop()