将参数传递给按钮的命令选项 [英] Passing parameters to a button's command option

问题描述

如何使用带有参数的按钮功能?

How do I use a function with parameters for a button?

from Tkinter import *
def function(x, y):
    x * y

root = Tk()
button_1 = Button(root, text='Times two numbers', command=function)

那么我该如何通过?我可以吗?

So how do I pass it? Would I:

button_1 = Button(root, text='Times two numbers', command=function(z,v))

如果那行不通，请有人解释一下它的工作原理，我见过有人使用 lambda ，但我不理解.

If that doesn't work can someone please explain how it works I saw people using lambda but I don't understand it.

推荐答案

是的，您可以为此使用 lambda :

Yes, you can use a lambda for this:

button_1 = Button(root, text='Times two numbers', command=lambda: function(z,v))

lambda 创建已知的内容作为匿名函数.等效于:

def callback():
    function(z,v)
button_1 = Button(root, text='Times two numbers', command=callback)

除了该函数是内联创建的.

except that the function is created inline.

请注意，您不能执行以下操作:

Note that you cannot do:

button_1 = Button(root, text='Times two numbers', command=function(z,v))

因为 function(z，v)是有效的函数调用，并且在Python解释上述行时将照此执行.因此，会将 command 分配给 function(z，v)的返回值.

because function(z,v) is a valid function call and will be executed as such when Python interprets the above line. So, command will be assigned to the return value of function(z,v).

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