How to use the pylast._ScrobblerRequest.execute function in pylast

token = md5(self.password + timestamp)
        elif self.network.api_key and self.network.api_secret and self.network.session_key:
            if not self.username:
                self.username = self.network.get_authenticated_user().get_name()
            token = md5(self.network.api_secret + timestamp)
        
        params = {"hs": "true", "p": "1.2.1", "c": self.client_id,
            "v": self.client_version, "u": self.username, "t": timestamp,
            "a": token}
        
        if self.network.session_key and self.network.api_key:
            params["sk"] = self.network.session_key
            params["api_key"] = self.network.api_key
        
        server = self.network.submission_server
        response = _ScrobblerRequest(server, params, self.network, "GET").execute().split("\n")
        
        self.session_id = response[1]
        self.nowplaying_url = response[2]
        self.submissions_url = response[3]

i = 0
        for t in tracks:
            _pad_list(t, 9, "")
            params["a[%s]" % str(i)] = _string(t[0])
            params["t[%s]" % str(i)] = _string(t[1])
            params["i[%s]" % str(i)] = str(t[2])
            params["o[%s]" % str(i)] = t[3]
            params["r[%s]" % str(i)] = t[4]
            params["l[%s]" % str(i)] = str(t[5])
            params["b[%s]" % str(i)] = _string(t[6])
            params["n[%s]" % str(i)] = t[7]
            params["m[%s]" % str(i)] = t[8]

            i += 1

        _ScrobblerRequest(self.submissions_url, params, self.network).execute()

        if remainder:
            self.scrobble_many(remainder)

i = 0
        for t in tracks:
            _pad_list(t, 9, "")
            params["a[%s]" % str(i)] = _string(t[0])
            params["t[%s]" % str(i)] = _string(t[1])
            params["i[%s]" % str(i)] = str(t[2])
            params["o[%s]" % str(i)] = t[3]
            params["r[%s]" % str(i)] = t[4]
            params["l[%s]" % str(i)] = str(t[5])
            params["b[%s]" % str(i)] = _string(t[6])
            params["n[%s]" % str(i)] = t[7]
            params["m[%s]" % str(i)] = t[8]
            
            i += 1
        
        _ScrobblerRequest(self.submissions_url, params, self.network).execute()
        
        if remainder:
            self.scrobble_many(remainder)