code: def config_prov(config):
      
      try:
          providers = [e.strip() for e in (config['info']
                                           ['providers']).split(',')]
      except KeyError as e:
          print("Error reading config item: {}".format(e))
          sys.exit()
      providers = list(OrderedDict.fromkeys(providers))
      return providers
docs: Read providers from configfile and de-duplicate it.