code: def do_po(self):
          
          log.debug("Start updating po files ...")
          pot_path = (self._po_path / self._basename).with_suffix(".pot")
          for po_dir_path in self._iter_po_dir():
              po_path = (po_dir_path / self._basename).with_suffix(".po")
              if po_path.exists():
                  log.debug("update {po}:".format(po=str(po_path)))
                  check_call(["msgmerge", "-U", str(po_path), str(pot_path)])
              else:
                  log.debug("create {po}:".format(po=str(po_path)))
                  check_call(["msginit", "-i", str(pot_path), "-o", str(po_path), "--no-translator"])
              po_copy_path = self._mo_path / po_path.parent.name / po_path.name
              po_copy_path.parent.mkdir(exist_ok=True)
              log.debug("Copying po file to mo path: {po_copy_path}".format(po_copy_path=str(po_copy_path)))
  
              shutil.copy(str(po_path), str(po_copy_path))
          log.debug("All po files updated")
docs: Update all po files with the data in the pot reference file.