new_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  
  """Rename the generated kv file to be compatible with the original kivy kv file
  detection of `App.load_kv`.
  """
  
  import os
  
  
  package_dir = '{{cookiecutter.repo_name}}'
  old_kv_file = os.path.join(package_dir, '{{cookiecutter.app_class_name}}.kv')
  
  lower_app_class_name = '{{cookiecutter.app_class_name}}'.lower()
  if (lower_app_class_name.endswith('app')):
      lower_app_class_name = lower_app_class_name[:-3]
  new_kv_file = os.path.join(package_dir, '{}.kv'.format(lower_app_class_name))
  
  os.rename(old_kv_file, new_kv_file)
  
subject: Implement a post gen python script to rename the kv file