Python GUI编程完整示例

import osfrom time import sleepfrom tkinter import *from tkinter.messagebox import showinfoclass DirList(object):  def __init__(self, initdir=None):    self.top = Tk()    self.label = Label(master=self.top, text='Directory Lister V1.0')    self.label.pack()    self.cwd = StringVar(master=self.top)    self.dirl = Label(self.top, fg='blue', font=('Helvetica', 14, 'bold'))    self.dirl.pack()    self.dirfm = Frame(master=self.top)    self.dirsb = Scrollbar(master=self.dirfm)    self.dirsb.pack(side=RIGHT,fill=Y)　　　　# fill=Y，垂直填充空间排列    self.dirs = Listbox(master=self.dirfm, height=15, width=50, yscrollcommand=self.dirsb.set)    self.dirs.bind('<Double-1>', func=self.setDirAndGo)  　　# <Double-1>，双击显示路径列表    self.dirsb.config(command=self.dirs.yview)    self.dirs.pack(side=LEFT, fill=BOTH)    self.dirfm.pack()    self.dirn = Entry(master=self.top, width=50, textvariable=self.cwd)    self.dirn.bind('<Return>', func=self.doLS)    self.dirn.pack()    self.bfm = Frame(master=self.top)    self.cleer = Button(master=self.bfm, text='清除', command=self.clrDir, activeforeground='white',             activebackground='blue')    self.ls = Button(master=self.bfm, text='显示列表', command=self.doLS, activeforeground='white',             activebackground='green')    self.quit = Button(master=self.bfm, text='退出', command=self.top.quit, activeforeground='white',              activebackground='red')    self.cleer.pack(side=LEFT)    self.ls.pack(side=LEFT)    self.quit.pack(side=LEFT)    self.bfm.pack()    if initdir:      self.cwd.set(os.curdir)      self.doLS()  def setDirAndGo(self, ev=None):    self.last = self.cwd.get()    self.dirs.config(selectbackground='red')    chek = self.dirs.get(self.dirs.curselection())    if not chek:      chek = os.curdir    self.cwd.set(chek)    self.doLS()  def doLS(self, ev=None):    error = ''    tdir = self.cwd.get()    if not tdir:      tdir = os.curdir    if not os.path.exists(tdir):      error = tdir + '：未找到文件，请检查路径！'    elif not os.path.isdir(tdir):      error = tdir + '：不是一个路径！'    if error:      # self.cwd.set(error)      showinfo(title='提示',message=error)      self.top.update()      # sleep(2)      if not (hasattr(self, 'last') and self.last):        self.last = os.curdir        self.cwd.set(self.last)        self.dirs.config(selectbackground='LightSkyBlue')        self.top.update()        return    if not os.path.isdir(tdir):      self.cwd.set('')    else:      self.cwd.set('获取目录内容中...')    self.top.update()    dirlist = os.listdir(tdir)    dirlist.sort()    os.chdir(tdir)    self.dirl.config(text=os.getcwd())    self.dirs.delete(0, END)    self.dirs.insert(END, os.curdir)    self.dirs.insert(END, os.pardir)    for eachfile in dirlist:      self.dirs.insert(END, eachfile)    self.cwd.set(os.curdir)    self.dirs.config(selectbackground='LightSkyBlue')  def clrDir(self, ev=None):    self.cwd.set('')if __name__ == '__main__':  dir = DirList(os.curdir)  mainloop()