How to use the pysd.Not_found function in pysd

# V.2009.S01E10.HDTV.XviD-2HD.avi.
            match = re.match(r"""^(.+) \d{4}$""", name)
            if match:
                names.append(match.group(1))
            # Searching for possible aliases <--

            # Checking gotten data -->
            for name in names:
                if not re.search("[a-z0-9]", name):
                    raise Not_found()

                if not season or not episode:
                    raise Not_found()
            # Checking gotten data <--
        except Not_found:
            raise Not_found("This is not a TV show {0} file or it has non-standard file name.",
                "subtitles" if is_subtitles else "video" )

        if is_subtitles:
            if extra_info and (
                len(extra_info[-1]) == 2 and extra_info[-1] in LANGUAGES or
                len(extra_info[-1]) == 3 and extra_info[-1] in LANGUAGES.values()
            ):
                language = extra_info[-1]
            else:
                language = "en"

            return ( names, season, episode, delimiter, language )
        else:
            return ( names, season, episode, delimiter, extra_info )

# Sometimes releasers include in the show name a year when TV show was
            # started. For example, "V" TV show files was named as
            # V.2009.S01E10.HDTV.XviD-2HD.avi.
            match = re.match(r"""^(.+) \d{4}$""", name)
            if match:
                names.append(match.group(1))
            # Searching for possible aliases <--

            # Checking gotten data -->
            for name in names:
                if not re.search("[a-z0-9]", name):
                    raise Not_found()

                if not season or not episode:
                    raise Not_found()
            # Checking gotten data <--
        except Not_found:
            raise Not_found("This is not a TV show {0} file or it has non-standard file name.",
                "subtitles" if is_subtitles else "video" )

        if is_subtitles:
            if extra_info and (
                len(extra_info[-1]) == 2 and extra_info[-1] in LANGUAGES or
                len(extra_info[-1]) == 3 and extra_info[-1] in LANGUAGES.values()
            ):
                language = extra_info[-1]
            else:
                language = "en"

            return ( names, season, episode, delimiter, language )
        else:

# "The Mentalist" == "Mentalist"
            if name.startswith("the "):
                names.append(name[4:])

            # Sometimes releasers include in the show name a year when TV show was
            # started. For example, "V" TV show files was named as
            # V.2009.S01E10.HDTV.XviD-2HD.avi.
            match = re.match(r"""^(.+) \d{4}$""", name)
            if match:
                names.append(match.group(1))
            # Searching for possible aliases <--

            # Checking gotten data -->
            for name in names:
                if not re.search("[a-z0-9]", name):
                    raise Not_found()

                if not season or not episode:
                    raise Not_found()
            # Checking gotten data <--
        except Not_found:
            raise Not_found("This is not a TV show {0} file or it has non-standard file name.",
                "subtitles" if is_subtitles else "video" )

        if is_subtitles:
            if extra_info and (
                len(extra_info[-1]) == 2 and extra_info[-1] in LANGUAGES or
                len(extra_info[-1]) == 3 and extra_info[-1] in LANGUAGES.values()
            ):
                language = extra_info[-1]
            else:
                language = "en"

def __get_episodes(self, show_name, season):
        """Returns a list of episodes for which we have subtitles."""

        shows = self.__get_shows()

        if show_name in shows:
            show = shows[show_name]
        else:
            raise Not_found()

        try:
            if season not in show["seasons"]:
                episodes = {}

                episode_list_url = self.__url_prefix + "tvshow-{0}-{1}.html".format(show["id"], season)
                episode_list_html = get_url_contents(episode_list_url).decode("utf-8", errors = "replace")

                all_episodes_regex = re.compile(r"""
                    ]*){0,1}>\s*\s*
                    ]*){0,1}>\s*
                    ]*){0,1}\s+
                        href\s*=\s*["']{0,1}
                            /{0,1}episode-""" + str(show["id"]) + "-" + str(season) + r"""\.html
                        ["']{0,1}
                    (\s[^>]*){0,1}>