(cls, crawler, robotstxt_body)
Parse the content of a robots.txt_ file as bytes. This must be a class method.
        It must return a new instance of the parser backend.

        :param crawler: crawler which made the request
        :type crawler: :class:`~scrapy.crawler.Crawler` instance

        :param robotstxt_body: content of a robots.txt_ file.
        :type robotstxt_body: bytes
Parse the content of a robots.txt_ file as bytes. This must be a class method.
        It must return a new instance of the parser backend.
Parse the content of a robots . txt_ file as bytes . This must be a class method . It must return a new instance of the parser backend .
def from_crawler(cls, crawler, robotstxt_body):
        """Parse the content of a robots.txt_ file as bytes. This must be a class method.
        It must return a new instance of the parser backend.

        :param crawler: crawler which made the request
        :type crawler: :class:`~scrapy.crawler.Crawler` instance

        :param robotstxt_body: content of a robots.txt_ file.
        :type robotstxt_body: bytes
        """
        pass
def from_crawler ( cls , crawler , robotstxt_body ) : pass