code: def read(self, size=None):
      
      data = b''
      while ((size and len(data) < size) and
             self._current_offset < self.uncompressed_data_size):
        member = self._GetMemberForOffset(self._current_offset)
        member_offset = self._current_offset - member.uncompressed_data_offset
        data_read = member.ReadAtOffset(member_offset, size)
        if data_read:
          self._current_offset += len(data_read)
          data = b''.join([data, data_read])
  
      return data
docs: Reads a byte string from the gzip file at the current offset.
  
      The function will read a byte string up to the specified size or
      all of the remaining data if no size was specified.
  
      Args:
        size (Optional[int]): number of bytes to read, where None is all
            remaining data.
  
      Returns:
        bytes: data read.
  
      Raises:
        IOError: if the read failed.
        OSError: if the read failed.