def twitch_channel_extract(self):
        """
        Examples:
        - channel_name
        - https://www.twitch.tv.channel_name
        - something_wrong?!twitch.tv/channel_name
        """
        string = self.twitch_channel.data.strip()
        position = string.find('twitch.tv')
        if position != -1:
            path = urlparse(string[position:]).path.split('/')
            if len(path) < 2:
                return None
            string = path[1]

        return string if 25 <= len(string) and re.match(r'\w*$', string) else None
dataset/ETHPy150Open WatchPeopleCode/WatchPeopleCode/wpc/forms.py/EditStreamerInfoForm.twitch_channel_extract/swapped operands of `<=`