docs: def xgettext(self, template):
          """Extracts to be translated strings from template and turns it into po format."""
  
          cmd = 'xgettext -d django -L Python --keyword=gettext_noop \
              --keyword=gettext_lazy --keyword=ngettext_lazy:1,2 --from-code=UTF-8 \
              --output=- -'
  
          p = subprocess.Popen(cmd, shell=True, stdin=subprocess.PIPE,
              stdout=subprocess.PIPE, stderr=subprocess.PIPE)
          (msg, err) = p.communicate(input=templatize(template))
  
          if err:
              # dont raise exception, some stuff in stderr are just warmings
              logging.warning(err)
  
          if XGETTEXT_REENCODES_UTF8:
              return msg.decode('utf-8').encode('iso-8859-1')
  
          return msg