使用python gtk执行终端命令

import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk
import subprocess

class MyWindow(Gtk.Window):
    def __init__(self):
        Gtk.Window.__init__(self, title="终端命令执行器")
        self.set_default_size(400, 300)
        self.connect("destroy", Gtk.main_quit)

        self.box = Gtk.Box(orientation=Gtk.Orientation.VERTICAL, spacing=6)
        self.add(self.box)

        self.entry = Gtk.Entry()
        self.box.pack_start(self.entry, True, True, 0)

        self.button = Gtk.Button(label="执行命令")
        self.button.connect("clicked", self.on_button_clicked)
        self.box.pack_start(self.button, True, True, 0)

        self.textview = Gtk.TextView()
        self.textbuffer = self.textview.get_buffer()
        self.box.pack_start(self.textview, True, True, 0)

    def on_button_clicked(self, widget):
        command = self.entry.get_text()
        output = subprocess.check_output(command, shell=True)
        self.textbuffer.set_text(output.decode())

win = MyWindow()
win.show_all()
Gtk.main()