config.py 文件源码

def process_path_value(cls, val, must_exist, can_have_subdict):
        """
        does the relative path processing for a value from the dictionary,
        which can be a string, a list of strings, or a list of strings
        and "tagged" strings (sub-dictionaries whose values are strings)
        :param val: the value we are processing, for error messages
        :param must_exist: whether there must be a value
        :param can_have_subdict: whether the value can be a tagged string
        """
        if isinstance(val, six.string_types):
            return cls.relative_path(val, must_exist)
        elif isinstance(val, list):
            vals = []
            for entry in val:
                if can_have_subdict and isinstance(entry, dict):
                    for subkey, subval in six.iteritems(entry):
                        vals.append({subkey: cls.relative_path(subval, must_exist)})
                else:
                    vals.append(cls.relative_path(entry, must_exist))
            return vals