code: def try_get_dn_part(subject, oid=None):
      
      try:
          if subject is None:
              return None
          if oid is None:
              return None
  
          for sub in subject:
              if oid is not None and sub.oid == oid:
                  return sub.value
      except:
          pass
      return None
docs: Tries to extracts the OID from the X500 name.
      :param subject:
      :param oid:
      :return: