Python: tkinter实例改名小工具

 #!/usr/bin/env python
 #coding=utf-8
 #
 # 版权所有 2014 yao_yu (http://blog.csdn.net/yao_yu_126)
 # 本代码以MIT许可协议发布
 # 文件名批量加.xls后缀
 # 2014-04-21  创建
 # 

 import os
 import tkinter  as tk
 from tkinter    import ttk

 version = '2014-04-21'
 app_title = '文件名批量加后缀 Ver:' + version

 listdir = os.listdir
 isdir = os.path.isdir
 isfile = os.path.isfile
 path_join = os.path.join

 #----------------------------  Object Visit   ----------------------------#
 def visit_directory_files(root, visitor):
     for i in listdir(root):
         i = path_join(root, i)
         if isdir(i):
             if visit_directory_files(i, visitor):
                 return True
         elif isfile(i):
             if visitor(i):
                 return True

 #----------------------------    Visitor   ----------------------------#
 class ListVisitor(object):
     def __init__(self, *visitors, terminate = True):
         if (visitors
                  and isinstance(visitors, (list, tuple))
                  and isinstance(visitors[0], (list, tuple))):
             visitors = visitors[0]
         self._visitors = list(visitors)
         self._terminate = terminate
     def __call__(self, *args, **kwdargs):
         for visitor in self._visitors:
             if visitor(*args, **kwdargs):
                 return self._terminate
     def append(self, visitor):
         assert(visitor)
         self._visitors.append(visitor)

 def get_screen_size(window):
     return window.winfo_screenwidth(),window.winfo_screenheight()

 def get_window_size(window):
     return window.winfo_reqwidth(),window.winfo_reqheight()

 def center_window(root, width, height):
     screenwidth = root.winfo_screenwidth()
     screenheight = root.winfo_screenheight()
     size = '%dx%d+%d+%d' % (width, height, (screenwidth - width)/2, (screenheight - height)/2)
     root.geometry(size)

 class Application(object):
     def __init__(self, master):
         self.master = ttk.Frame(master)
         self.master.pack(side = tk.TOP, expand = tk.YES, fill = tk.BOTH)
         self.create_widgets()

     def create_widgets(self):
         master = self.master
         master.columnconfigure(1, weight=1)
         master.rowconfigure(2, weight=1)
         self.targetdir = tk.StringVar()
         self.targetdir.set('/Volumes/Data/Document/Test')
         padx = 5
         pady = 10
         ttk.Label(master, text="操作目录").grid(row = 0, column = 0, stick = tk.E, padx = padx, pady = pady)
         ttk.Entry(master, textvariable = self.targetdir).grid(row = 0, column = 1, stick = tk.EW, padx = padx)
         commands = ttk.Frame(master)
         commands.grid(row = 1, column = 0, columnspan = 2)
         ttk.Button(commands, text="开始", command = self.onStart).pack(side = tk.LEFT)
         ttk.Button(commands, text="退出", command = master.quit).pack(side = tk.LEFT)

         self.status = tk.StringVar()
         self.status.set('就绪')
         master.rowconfigure(3, minsize = 160)
         ttk.Label(master, textvariable = self.status, wraplength=600).grid(row = 3, column = 0, columnspan = 2, padx = padx, stick = tk.NSEW)
         self.progress = ttk.Progressbar(master, maximum=100, orient=tk.HORIZONTAL, mode='determinate')
         self.progress.grid(row = 4, column = 0, columnspan = 2, padx = padx, stick = tk.NSEW)

     def onStart(self):
         targetdir = self.targetdir.get().strip()
         basename = os.path.basename(targetdir)
         if os.path.isdir(targetdir):
             listvisitor = ListVisitor(ProgressVisitor(self.progress),
                                         self.StatusVisitor(),
                                         FileLogVisitor(basename),
                                         #FileRenameVisitor(basename),
                                         )
             visit_directory_files(targetdir, listvisitor)
         else:
             self.status.set('目标目录不存在')

     def StatusVisitor(self):
         print_status = self.status.set
         def __call__(file):
             __call__.n += 1
             print_status('%s,%s' % (__call__.n, file))
         __call__.n = 0
         return __call__

 splitext = os.path.splitext
 file_rename = os.rename
 knownexts = dict.fromkeys(['.jpg', '.log', '.pdf', '.tif', '.xls', '.zip', '.rar'])
 class FileRenameVisitor(object):
     def __init__(self, file):
         self.__fp = open('%s_%s_rename.txt' % (os.path.splitext(__file__)[0], file), 'w')
     def __call__(self, file):
         ext = splitext(file)[1].lower()
         if ext not in knownexts:
             file_rename(file, file + '.xls')
             self.__fp.write('%s\n' % file)
     def __del__(self):
         self.__fp.close()

 class FileLogVisitor(object):
     def __init__(self, file):
         self.__fp = open('%s_%s_all.txt' % (os.path.splitext(__file__)[0], file), 'w')
     def __call__(self, file):
         self.__fp.write('%s\n' % file)
     def __del__(self):
         self.__fp.close()

 class ProgressVisitor(object):
     COUNT = 202
     def __init__(self, progress, count=COUNT):
         self.progress = progress
         if count and isinstance(count, int) and count > 0:
             self.count = count
         else:
             self.count = self.COUNT
         self.n = 1
     def __call__(self, *args, **kwdargs):
         self.n += 1
         if self.n == self.count:
             self.progress.step()
             self.progress.update()
             self.n = 1
     def __del__(self):
         self.progress['value'] = 0

 if __name__ == '__main__':
     root = tk.Tk()
     root.title(app_title)
     app = Application(root)
     center_window(root, 600, 240)
     tk.mainloop()