code: def attach(
          self,
          data,
          file_name=None,
          comment=None,
          compression=True,
          mime=r"application/octet-stream",
          embedded=True,
      ):
          
          if data in self._attachments_cache:
              return self._attachments_cache[data]
          else:
              creator_index = len(self.file_history)
              fh = FileHistory()
              fh.comment = """<FHcomment>
  <TX>Added new embedded attachment from {}</TX>
  <tool_id>asammdf</tool_id>
  <tool_vendor>asammdf</tool_vendor>
  <tool_version>{}</tool_version>
  </FHcomment>""".format(
                  file_name if file_name else "bin.bin", __version__
              )
  
              self.file_history.append(fh)
  
              file_name = file_name or "bin.bin"
  
              at_block = AttachmentBlock(
                  data=data,
                  compression=compression,
                  embedded=embedded,
                  file_name=file_name,
              )
              at_block["creator_index"] = creator_index
              index = v4c.MAX_UINT64 - 1
              while index in self._attachments_map:
                  index -= 1
              self.attachments.append(at_block)
  
              at_block.mime = mime
              at_block.comment = comment
  
              self._attachments_cache[data] = index
              self._attachments_map[index] = len(self.attachments) - 1
  
              return index
docs: attach embedded attachment as application/octet-stream
  
          Parameters
          ----------
          data : bytes
              data to be attached
          file_name : str
              string file name
          comment : str
              attachment comment
          compression : bool
              use compression for embedded attachment data
          mime : str
              mime type string
          embedded : bool
              attachment is embedded in the file
  
          Returns
          -------
          index : int
              new attachment index