python Tkinter按钮带参数

from Tkinter import *

def cross(value):
text.insert(INSERT,'x')
window =Tk()
frame =Frame(window)
frame.pack()

text =Text(frame,height =3,width =10)
text.pack()

button=Button(frame,text="add",command = lambda:cross(text))
button.pack()

window.mainloop()