@property<EOL><INDENT>@check_soup('<STR_LIT>', '<STR_LIT>')<EOL>def photo_url(self):<DEDENT>
if self.url is not None:<EOL><INDENT>if self.soup is not None:<EOL><INDENT>img = self.soup.find('<STR_LIT>', class_='<STR_LIT>')['<STR_LIT:src>']<EOL>return img.replace('<STR_LIT>', '<STR_LIT>')<EOL><DEDENT>else:<EOL><INDENT>assert (self.card is not None)<EOL>return PROTOCOL + self.card.img['<STR_LIT:src>'].replace('<STR_LIT>', '<STR_LIT>')<EOL><DEDENT><DEDENT>else:<EOL><INDENT>return '<STR_LIT>'<EOL><DEDENT>
获取用户头像图片地址.

        :return: 用户头像url
        :rtype: str