code: def find_templates(input_dir):
      
      templates = []
  
      def template_finder(result, dirname):
          for obj in os.listdir(dirname):
              if obj.endswith('.mustache'):
                  result.append(os.path.join(dirname, obj))
  
      dir_visitor(
          input_dir,
          functools.partial(template_finder, templates)
      )
      return templates
docs: _find_templates_
  
      traverse the input_dir structure and return a list
      of template files ending with .mustache
  
      :param input_dir: Path to start recursive search for
         mustache templates
      :returns: List of file paths corresponding to templates