parser.py 文件源码

def load(yaml_string, schema=None, label=u"<unicode string>"):
    """
    Parse the first YAML document in a string
    and produce corresponding YAML object.
    """
    if str(type(yaml_string)) not in ("<type 'unicode'>", "<type 'str'>", "<class 'str'>"):
        raise TypeError("StrictYAML can only read a string of valid YAML.")

    # We manufacture a class that has the label we want
    DynamicStrictYAMLLoader = type('DynamicStrictYAMLLoader', (StrictYAMLLoader,), {"label": label})

    try:
        document = ruamelyaml.load(yaml_string, Loader=DynamicStrictYAMLLoader)
    except ruamelyaml.YAMLError as parse_error:
        if parse_error.context_mark is not None:
            parse_error.context_mark.name = label
        if parse_error.problem_mark is not None:
            parse_error.problem_mark.name = label

        raise parse_error

    # Document is just a (string, int, etc.)
    if type(document) not in (CommentedMap, CommentedSeq):
        document = yaml_string

    if schema is None:
        schema = Any()

    return schema(YAMLChunk(document, label=label))