frontmatter.py 文件源码

def extract_authors(self, field, name, docinfo):
        try:
            if len(field[1]) == 1:
                if isinstance(field[1][0], nodes.paragraph):
                    authors = self.authors_from_one_paragraph(field)
                elif isinstance(field[1][0], nodes.bullet_list):
                    authors = self.authors_from_bullet_list(field)
                else:
                    raise TransformError
            else:
                authors = self.authors_from_paragraphs(field)
            authornodes = [nodes.author('', '', *author)
                           for author in authors if author]
            if len(authornodes) >= 1:
                docinfo.append(nodes.authors('', *authornodes))
            else:
                raise TransformError
        except TransformError:
            field[-1] += self.document.reporter.warning(
                  'Bibliographic field "%s" incompatible with extraction: '
                  'it must contain either a single paragraph (with authors '
                  'separated by one of "%s"), multiple paragraphs (one per '
                  'author), or a bullet list with one paragraph (one author) '
                  'per item.'
                  % (name, ''.join(self.language.author_separators)),
                  base_node=field)
            raise