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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def setup_url(self, url):
 r"""Attempt to parse a RTMP URL. Additional options may be specified by appending space-separated key=value pairs to the URL. Special characters in values may need to be escaped to prevent misinterpretation by the option parser. The escape encoding uses a backslash followed by two hexadecimal digits representing the ASCII value of the character. E.g., spaces must be escaped as `\\20` and backslashes must be escaped as `\\5c`. :param url: str, A RTMP URL in the format `rtmp[t][e|s]://hostname[:port][/app[/playpath]]` Raises :exc:`RTMPError` if URL parsing fails. """


        self.url = bytes(url, "utf8")

        res = librtmp.RTMP_SetupURL(self.rtmp, self.url)
        if res < 1:
            raise RTMPError("Unable to parse URL")