code: def get_swagger_schema(settings):
      
      schema_dir = settings.get('pyramid_swagger.schema_directory', 'api_docs')
      resource_listing = get_resource_listing(
          schema_dir,
          settings.get('pyramid_swagger.generate_resource_listing', False)
      )
  
      if settings.get('pyramid_swagger.enable_swagger_spec_validation', True):
          validate_swagger_schema(schema_dir, resource_listing)
  
      return compile_swagger_schema(schema_dir, resource_listing)
docs: Return a :class:`pyramid_swagger.model.SwaggerSchema` constructed from
      the swagger specs in `pyramid_swagger.schema_directory`. If
      `pyramid_swagger.enable_swagger_spec_validation` is enabled the schema
      will be validated before returning it.
  
      :param settings: a pyramid registry settings with configuration for
          building a swagger schema
      :type settings: dict
      :returns: a :class:`pyramid_swagger.model.SwaggerSchema`