306     _file = None  # Set here since __del__ checks it  variable in Aifc_read
313         self._file = file
329                 chunk = Chunk(self._file)
370         return self._file
377         file = self._file
379             self._file = None
557     _file = None  # Set here since __del__ checks it  variable in Aifc_write
576         self._file = file
731         self._file.write(data)
742         if self._file is None:
748                 self._file.write(b'\x00')
758             f = self._file
759             self._file = None
808         self._file.write(b'FORM')
824             self._form_length_pos = self._file.tell()
829             self._file.write(b'AIFC')
830             self._file.write(b'FVER')
831             _write_ulong(self._file, 4)
832             _write_ulong(self._file, self._version)
834             self._file.write(b'AIFF')
835         self._file.write(b'COMM')
836         _write_ulong(self._file, commlength)
837         _write_short(self._file, self._nchannels)
839             self._nframes_pos = self._file.tell()
840         _write_ulong(self._file, self._nframes)
842             _write_short(self._file, 8)
844             _write_short(self._file, self._sampwidth * 8)
845         _write_float(self._file, self._framerate)
847             self._file.write(self._comptype)
848             _write_string(self._file, self._compname)
849         self._file.write(b'SSND')
851             self._ssnd_length_pos = self._file.tell()
852         _write_ulong(self._file, self._datalength + 8)
853         _write_ulong(self._file, 0)
854         _write_ulong(self._file, 0)
865         _write_ulong(self._file, 4 + verslength + self._marklength + \
870         curpos = self._file.tell()
873             self._file.write(b'\x00')
879             self._file.seek(curpos, 0)
881         self._file.seek(self._form_length_pos, 0)
883         self._file.seek(self._nframes_pos, 0)
884         _write_ulong(self._file, self._nframeswritten)
885         self._file.seek(self._ssnd_length_pos, 0)
886         _write_ulong(self._file, datalength + 8)
887         self._file.seek(curpos, 0)
894         self._file.write(b'MARK')
901         _write_ulong(self._file, length)
903         _write_short(self._file, len(self._markers))
906             _write_short(self._file, id)
907             _write_ulong(self._file, pos)
908             _write_string(self._file, name)