spectesting.py 文件源码

def parse(u):
    """
    Parse the contents of a spec test file, and return a dict.

    Arguments:

      u: a unicode string.

    """
    # TODO: find a cleaner mechanism for choosing between the two.
    if yaml is None:
        # Then use json.

        # The only way to get the simplejson module to return unicode strings
        # is to pass it unicode.  See, for example--
        #
        #   http://code.google.com/p/simplejson/issues/detail?id=40
        #
        # and the documentation of simplejson.loads():
        #
        #   "If s is a str then decoded JSON strings that contain only ASCII
        #    characters may be parsed as str for performance and memory reasons.
        #    If your code expects only unicode the appropriate solution is
        #    decode s to unicode prior to calling loads."
        #
        return json.loads(u)
    # Otherwise, yaml.

    def code_constructor(loader, node):
        value = loader.construct_mapping(node)
        return eval(value['python'], {})

    yaml.add_constructor(u'!code', code_constructor)
    return yaml.load(u)