291     _file = None  # Set here since __del__ checks it  variable in Aifc_read
299         self._file = file
315                 chunk = Chunk(self._file)
362         return self._file
375             self._file.close()
574     _file = None  # Set here since __del__ checks it  variable in Aifc_write
590         self._file = file
608         if self._file:
737         self._file.write(data)
748         if self._file is None:
754                 self._file.write(chr(0))
767             f = self._file
768             self._file = None
854         self._file.write('FORM')
870             self._form_length_pos = self._file.tell()
875             self._file.write('AIFC')
876             self._file.write('FVER')
877             _write_ulong(self._file, 4)
878             _write_ulong(self._file, self._version)
880             self._file.write('AIFF')
881         self._file.write('COMM')
882         _write_ulong(self._file, commlength)
883         _write_short(self._file, self._nchannels)
885             self._nframes_pos = self._file.tell()
886         _write_ulong(self._file, self._nframes)
888             _write_short(self._file, 8)
890             _write_short(self._file, self._sampwidth * 8)
891         _write_float(self._file, self._framerate)
893             self._file.write(self._comptype)
894             _write_string(self._file, self._compname)
895         self._file.write('SSND')
897             self._ssnd_length_pos = self._file.tell()
898         _write_ulong(self._file, self._datalength + 8)
899         _write_ulong(self._file, 0)
900         _write_ulong(self._file, 0)
911         _write_ulong(self._file, 4 + verslength + self._marklength + \
916         curpos = self._file.tell()
919             self._file.write(chr(0))
925             self._file.seek(curpos, 0)
927         self._file.seek(self._form_length_pos, 0)
929         self._file.seek(self._nframes_pos, 0)
930         _write_ulong(self._file, self._nframeswritten)
931         self._file.seek(self._ssnd_length_pos, 0)
932         _write_ulong(self._file, datalength + 8)
933         self._file.seek(curpos, 0)
940         self._file.write('MARK')
947         _write_ulong(self._file, length)
949         _write_short(self._file, len(self._markers))
952             _write_short(self._file, id)
953             _write_ulong(self._file, pos)
954             _write_string(self._file, name)