browser.py 文件源码

def _filter_links(self, links, 
            text=None, text_regex=None,
            url=None, url_regex=None,
            predicate=None):
        predicates = []
        if text is not None:
            predicates.append(lambda link: link.string == text)
        if text_regex is not None:
            predicates.append(lambda link: re_compile(text_regex).search(link.string or ''))
        if url is not None:
            predicates.append(lambda link: link.get('href') == url)
        if url_regex is not None:
            predicates.append(lambda link: re_compile(url_regex).search(link.get('href', '')))
        if predicate:
            predicate.append(predicate)

        def f(link):
            for p in predicates:
                if not p(link):
                    return False
            return True

        return [link for link in links if f(link)]