How to use the yamale.util.get_iter function in yamale

if util.is_map(validator) and not util.is_map(data):
            return ["%s : '%s' is not a map" % (path, data)]

        if util.is_list(validator) and not util.is_list(data):
            return ["%s : '%s' is not a list" % (path, data)]

        errors = []

        if strict:
            data_keys = set(util.get_keys(data))
            validator_keys = set(util.get_keys(validator))
            for key in data_keys - validator_keys:
                error_path = path + DataPath(key)
                errors += ['%s: Unexpected element' % error_path]

        for key, sub_validator in util.get_iter(validator):
            errors += self._validate_item(sub_validator,
                                          data,
                                          path,
                                          strict,
                                          key)
        return errors

def _process_schema(self, path, schema_data, validators):
        """
        Go through a schema and construct validators.
        """
        if util.is_map(schema_data) or util.is_list(schema_data):
            for key, data in util.get_iter(schema_data):
                schema_data[key] = self._process_schema(path + DataPath(key),
                                                        data,
                                                        validators)
        else:
            schema_data = self._parse_schema_item(path,
                                                  schema_data,
                                                  validators)
        return schema_data

def __init__(self, *args, **kwargs):
        self.regex_name = kwargs.pop('name', None)

        flags = 0
        for k, v in util.get_iter(self._regex_flags):
            flags |= v if kwargs.pop(k, False) else 0

        self.regexes = [re.compile(arg, flags) for arg in args if util.isstr(arg)]
        super(Regex, self).__init__(*args, **kwargs)