使用python生成目录树

# encoding: utf-8  
  
import os   
class dir(object):   
  def __init__(self):   
    self.SPACE = ""   
    self.list = []  
    
  def getCount(self, url):  
    files = os.listdir(url)  
    count = 0;  
    for file in files:  
      myfile = url + "//" + file  
      if os.path.isfile(myfile):  
        count = count + 1  
    return count  
  def getDirList(self, url):   
    files = os.listdir(url)   
    fileNum = self.getCount(url)  
    tmpNum = 0  
    for file in files:   
      myfile = url + "//" + file   
      size = os.path.getsize(myfile)   
      if os.path.isfile(myfile):   
        tmpNum = tmpNum +1  
        if (tmpNum != fileNum):  
          self.list.append(str(self.SPACE) + "├─" + file + "/n")  
        else:  
          self.list.append(str(self.SPACE) + "└─" + file + "/n")  
      if os.path.isdir(myfile):   
        self.list.append(str(self.SPACE) + "├─" + file + "/n")   
        # change into sub directory  
        self.SPACE = self.SPACE + "│ "   
        self.getDirList(myfile)   
        # if iterator of sub directory is finished, reduce "│ "   
        self.SPACE = self.SPACE[:-4]   
    return self.list   
  def writeList(self, url):   
    f = open(url, 'w')   
    f.writelines(self.list)   
    print "ok"   
    f.close()   
if __name__ == '__main__':   
  d = dir()   
  d.getDirList("c:/windows") # input directory  
  d.writeList("c:/1.txt") # write to file