@class_common_init(re_ans_url)<EOL><INDENT>def __init__(self, url, question=None, author=None,<EOL>upvote_num=None, content=None, session=None):<DEDENT>
self.url = url<EOL>self._session = session<EOL>self._question = question<EOL>self._author = author<EOL>self._upvote_num = upvote_num<EOL>self._content = content<EOL>self._deleted = None<EOL>
创建答案类实例.

        :param str url: 答案url
        :param Question question: 答案所在的问题对象，可选
        :param Author author: 答案回答者对象，可选
        :param int upvote_num: 答案赞同数量，可选
        :param str content: 答案内容，可选
        :param Session session: 使用的网络会话，为空则使用新会话
        :return: 答案对象
        :rtype: Answer