old_contents: #!/usr/bin/env python
  # coding=utf-8
  
  import upload
  import signin
  import signout
  import register
  
new_contents: #!/usr/bin/env python
  # coding=utf-8
  
  import upload
  import signin
  import signout
  import register
  import avatar
  import user
  import error
  import index
  
subject: Update __init__.py