ListWalker
对象中注册modified
信号来实现此操作。import urwid
def callback():
index = str(listBox.get_focus()[1])
debug.set_text("Index of selected item: " + index)
debug = urwid.Text("Debug")
captions = "A B C D E F".split()
items = [urwid.Button(caption) for caption in captions]
walker = urwid.SimpleListWalker(items)
listBox = urwid.ListBox(walker)
urwid.connect_signal(walker, "modified", callback)
frame = urwid.Frame(body=listBox, header=debug)
urwid.MainLoop(frame).run()