最近在学pygtk，看了些教程，其中有个例程有些疑问，请大家解惑。
例程代码如下：
#!/usr/bin/env python

# example-start buttons buttons.py

import pygtk
pygtk.require('2.0')
import gtk

# Create a new hbox with an image and a label packed into it
# and return the box.

def xpm_label_box(parent, xpm_filename, label_text):
# Create box for xpm and label
box1 = gtk.HBox(False, 0)
box1.set_border_width(2)

# Now on to the image stuff.
image = gtk.Image()
image.set_from_file(xpm_filename)

# Create a label for the button
label = gtk.Label(label_text)

# Pack the pixmap and label into the box
box1.pack_start(image, False, False, 3)
box1.pack_start(label, False, False, 3)

image.show()
label.show()
return box1

class Buttons:
# Our usual callback method
def call_back(self, widget, data=None):
print "Hello again - %s was pressed" % data

def __init__(self):
# Create a new window
self.window = gtk.Window(gtk.WINDOW_TOPLEVEL)

self.window.set_title("Image's Buttons!")

# It's a good idea to do this for all windows.
self.window.connect("destroy", lambda wid: gtk.main_quit())
self.window.connect("delete_event", lambda a1, a2: gtk.main_quit())

# Sets the border width of the window.
self.window.set_border_width(10)

# Create a new button
button = gtk.Button()

# Connect the "clicked" signal of the button to our callback
button.connect("clicked", self.call_back, "cool button")

# This calls our box creating function
box1 = xpm_label_box(self.window, "info.xpm", "cool button")

# Pack and show all our widgets
button.add(box1)

box1.show()
button.show()

self.window.add(button)
self.window.show()

def main():
gtk.main()
return 0

if __name__ == "__main__":
Buttons()
main()

###########################END

 self.window.connect("destroy", lambda wid: gtk.main_quit())
 self.window.connect("delete_event", lambda a1, a2: gtk.main_quit())
这两处绑定信号处理函数时，为什么使用lambda函数呢？而且使用的参数个数也不一样，为什么不能直接绑定到gtk_main_quit()？
请大家给我讲讲window.connect()的详细用法，谢谢！
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可以想象成这样 window.connect帮你定义的这个函数
 def destory(wig):
 gtk.main_quit()
 def delete_event(a1,a2):
 gtk.main_quit()
 当destory event发生的时候,wig会被这个event的caller的传入
destory(wig)
 当delete_event event发生的时候,a1,a2会被这个event的caller的传入
delete_event(a1,a2)

因为传入什么值,几个值是caller已经决定好了的,而gtk_main_quit()不接受传入值,所以用了lambda
 
> 
> self.window.connect("destroy", lambda wid: gtk.main_quit())
> self.window.connect("delete_event", lambda a1, a2: gtk.main_quit())
> 这两处绑定信号处理函数时，为什么使用lambda函数呢？而且使用的参数个数也不一样，为什么不能直接绑定到gtk_main_quit()？
> 请大家给我讲讲window.connect()的详细用法，谢谢！
> 
> 
>
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