def load(self, filename, known_frames=None, translate=True, v2_version=4):
        """Load tags from a filename.

        Keyword arguments:

        * filename -- filename to load tag data from
        * known_frames -- dict mapping frame IDs to Frame objects
        * translate -- Update all tags to ID3v2.3/4 internally. If you
                       intend to save, this must be true or you have to
                       call update_to_v23() / update_to_v24() manually.
        * v2_version -- if update_to_v23 or update_to_v24 get called (3 or 4)

        Example of loading a custom frame::

            my_frames = dict(mutagen.id3.Frames)
            class XMYF(Frame): ...
            my_frames["XMYF"] = XMYF
            mutagen.id3.ID3(filename, known_frames=my_frames)
        """

        if not v2_version in (3, 4):
            raise ValueError("Only 3 and 4 possible for v2_version")

        from os.path import getsize

        self.filename = filename
        self.__known_frames = known_frames
        self._fileobj = open(filename, 'rb')
        self.__filesize = getsize(filename)
        try:
            try:
                self._load_header()
            except EOFError:
                self.size = 0
                raise ID3NoHeaderError("%s: too small (%d bytes)" % (
                    filename, self.__filesize))
            except (ID3NoHeaderError, ID3UnsupportedVersionError) as err:
                self.size = 0
                import sys
                stack = sys.exc_info()[2]
                try:
                    self._fileobj.seek(-128, 2)
                except EnvironmentError:
                    reraise(err, None, stack)
                else:
                    frames = ParseID3v1(self._fileobj.read(128))
                    if frames is not None:
                        self.version = self._V11
                        for v in frames.values():
                            self.add(v)
                    else:
                        reraise(err, None, stack)
            else:
                frames = self.__known_frames
                if frames is None:
                    if self._V23 <= self.version:
                        frames = Frames
                    elif self._V22 <= self.version:
                        frames = Frames_2_2
                data = self.__fullread(self.size - 10)
                for frame in self.__read_frames(data, frames=frames):
                    if isinstance(frame, Frame):
                        self.add(frame)
                    else:
                        self.unknown_frames.append(frame)
                self.__unknown_version = self.version
        finally:
            self._fileobj.close()
            del self._fileobj
            del self.__filesize
            if translate:
                if v2_version == 3:
                    self.update_to_v23()
                else:
                    self.update_to_v24()
Load tags from a filename.

        Keyword arguments:

        * filename -- filename to load tag data from
        * known_frames -- dict mapping frame IDs to Frame objects
        * translate -- Update all tags to ID3v2.3/4 internally. If you
                       intend to save, this must be true or you have to
                       call update_to_v23() / update_to_v24() manually.
        * v2_version -- if update_to_v23 or update_to_v24 get called (3 or 4)

        Example of loading a custom frame::

            my_frames = dict(mutagen.id3.Frames)
            class XMYF(Frame): ...
            my_frames["XMYF"] = XMYF
            mutagen.id3.ID3(filename, known_frames=my_frames)