post.py 文件源码

def headers(self):
        try:
            headers = next(yaml.load_all(self.read(body=False)))
        except StopIteration as e:
            raise ValueError("YAML header is missing. Please ensure that the top of your post has a header of the following form:\n" + SAMPLE_HEADER)
        except yaml.YAMLError as e:
            raise ValueError(
                "YAML header is incorrectly formatted or missing. The following information may be useful:\n{}\nIf you continue to have difficulties, try pasting your YAML header into an online parser such as http://yaml-online-parser.appspot.com/.".format(str(e)))
        for key, value in headers.copy().items():
            if isinstance(value, datetime.date):
                headers[key] = datetime.datetime.combine(value, datetime.time(0))
            if key == 'tags' and isinstance(value, list):
                headers[key] = [str(v) if six.PY3 else unicode(v) for v in value]
        return headers