import os, re """查看文件夾下的所有文件及文件夾 join為拼接函數"""def Look_File(path):  for root , dirs, files in os.walk(path, True):    print root     #主目錄    for item in files: #主目錄下的文件夾      print os.path.join(root, item)"""計算文件夾 大小"""    def FileSize(path):  size = 0L  for root , dirs, files in os.walk(path, True):    size += sum([os.path.getsize(os.path.join(root, name)) for name in files])    #目錄下文件大小累加    return sizeif __name__ == '__main__':  Look_File("f://a")  print FileSize("f://a")