点击按钮（ 通过lambda表达式传递参数到按钮的点击事件函数）

给tkinter的按钮添加点击事件处理函数，可以在创建按钮时将定义好的函数赋值给它的command属性，即

tk.Button(window, text='this is a button', command=clickFunc())

如果在点击按钮执行函数时还要传递参数，就要用到lambda了，写成以下形式

tk.Button(window, text='=', command=lambda: clickFunc(x, y, z))

写一个完整的小例子，来计算c = a + b

import tkinter as tk def add(x, y, z): x = int(x.get()) y = int(y.get()) z.set(str(x + y)) def windows(): window = tk.Tk() x = tk.StringVar() a = tk.Entry(window, textvariable=x) a.pack() a.place(x=20, y=100, width=20) x.set(1) addLabel = tk.Label(window, text='+') addLabel.pack() addLabel.place(x=45, y=98) y = tk.StringVar() b = tk.Entry(window, textvariable=y) b.pack() b.place(x=60, y=100, width=20) y.set(1) z = tk.StringVar() c = tk.Entry(window, textvariable=z) c.pack() c.place(x=120, y=100, width=20) equalButton = tk.Button(window, text='=', command=lambda: add(x, y, z)) equalButton.pack() equalButton.place(x=90, y=98) window.mainloop() if __name__ == '__main__': windows()

运行效果图