python 界面编程 并执行sh命令

#!/usr/bin/python# -*- coding: UTF-8 -*-from Tkinter import *           # 导入 Tkinter 库import threadimport timeimport osclass MessageShow:def __init__(self):#传入参数　消息内容　和这条消息显示的时间#消息显示的时间#self.WaitTime=timeself.root = Tk()                     # 创建窗口对象的背景色self.root.wm_title("机器人控制主窗口")#title#居中显示self.root.resizable(False,False)self.root.update() # update window ,must docurWidth = self.root.winfo_reqwidth() # get current widthcurHeight = self.root.winfo_height() # get current heightscnWidth,scnHeight = self.root.maxsize() # get screen width and height# now generate configuration informationtmpcnf = '%dx%d+%d+%d'%(200,100,(scnWidth-curWidth)/2,(scnHeight-curHeight)/2)self.root.geometry(tmpcnf)#l1=Label(self.root,text=message,background="yellow")#font=("宋体", 12, "normal")#l1=Label(self.root,text=message,foreground="red")#l1.pack(side=TOP,expand=YES)b1=Button(self.root,text="启动机器人虚拟驱动",command=self.b1Command)#b1['width']=10#b1['height']=1b1.pack(side=TOP,expand=YES)b2=Button(self.root,text="启动机器人虚拟路径导航界面",command=self.b2Command)b2.pack()b3=Button(self.root,text="启动机器人movebase",command=self.b3Command)b3.pack()#thread.start_new_thread(self.autoDestory,())    self.root.mainloop()                 # 进入消息循环def b1Command(self):os.system("gnome-terminal -x bash -c \"roslaunch agv fakeMinimalAGV.launch\"")def b2Command(self):os.system("gnome-terminal -x bash -c \"roslaunch agv mplannerfake.launch\"")def b3Command(self):os.system("gnome-terminal -x bash -c \"roslaunch agv move_base.launch\"")def autoDestory(self):time.sleep(self.WaitTime)self.root.destroy()if __name__=='__main__':MessageShow()