code: def friendly_number(self, value: int) -> str:
          
          if self.code not in ("en", "en_US"):
              return str(value)
          s = str(value)
          parts = []
          while s:
              parts.append(s[-3:])
              s = s[:-3]
          return ",".join(reversed(parts))
docs: Returns a comma-separated number for the given integer.