code: def _init_write_gz(self):
          
          self.cmp = self.zlib.compressobj(9, self.zlib.DEFLATED,
                                              -self.zlib.MAX_WBITS,
                                              self.zlib.DEF_MEM_LEVEL,
                                              0)
          timestamp = struct.pack("<L", int(time.time()))
          self.__write(b"\037\213\010\010" + timestamp + b"\002\377")
          if self.name.endswith(".gz"):
              self.name = self.name[:-3]
          # RFC1952 says we must use ISO-8859-1 for the FNAME field.
          self.__write(self.name.encode("iso-8859-1", "replace") + NUL)
docs: Initialize for writing with gzip compression.