code: def get_validated_options(options, warn=True):
      
      validated_options = {}
      for opt, value in iteritems(options):
          lower = opt.lower()
          try:
              validator = URI_VALIDATORS.get(lower, raise_config_error)
              value = validator(opt, value)
          except (ValueError, ConfigurationError) as exc:
              if warn:
                  warnings.warn(str(exc))
              else:
                  raise
          else:
              validated_options[lower] = value
      return validated_options
docs: Validate each entry in options and raise a warning if it is not valid.
      Returns a copy of options with invalid entries removed