code: def find_engine(filepath=None, name=None):
      
      if name is None:
          engines = anytemplate.engine.find_by_filename(filepath)
          if not engines:
              raise TemplateEngineNotFound("filename=%s" % str(filepath))
  
          return engines[0]  # It should have highest priority.
      else:
          engine = anytemplate.engine.find_by_name(name)
          if engine is None:
              raise TemplateEngineNotFound("(template) name=%s" % name)
  
          return engine
docs: :param filepath: Template file path
      :param name: Specify the name of template engine to use explicitly or
          None; it will be selected automatically anyhow.
  
      :return: Template engine class found