Name                                             Size  
 Parent Directory                                   -   
 1. 1.time module.mp4                              34M  
 1.1 1.time_module.py                             293   
 2.1 2.walk_function.py                           324   
 2. 2.walk function.mp4                            87M  
 3.1 3.get_UserName.py                             31   
 3. 3.get UserName.mp4                             21M  
 4.1 4.open_a_file_for_read_or_write.py           533   
 4. 4.open a file for read or write.mp4           163M  
 5.1 5.os.rename_file_or_folder.py                346   
 5. 5.os.rename file or folder.mp4                 61M  
 6.1 6.create_a_message_inside_each_folder.py     516   
 6. 6.create a message inside each folder.mp4     108M