code: def has_basis_notes(family, data_dir=None):
      '''Check if notes exist for a given basis set
  
      Returns True if they exist, false otherwise
      '''
  
      file_path = _basis_notes_path(family, data_dir)
      return os.path.isfile(file_pathf has_basis_notes(family, data_dir=None):
      '''Check if notes exist for a given basis set
  
      Returns True if they exist, false otherwise
      '''
  
      file_path = _basis_notes_path(family, data_dir)
      return os.path.isfile(file_path)
docs: Check if notes exist for a given basis set
  
      Returns True if they exist, false otherwise