@property<EOL><INDENT>@check_soup('<STR_LIT>')<EOL>def creation_time(self):<DEDENT>
logs = self._query_logs()<EOL>time_string = logs[-<NUM_LIT:1>].find('<STR_LIT>', class_='<STR_LIT>').time[<EOL>'<STR_LIT>']<EOL>return datetime.strptime(time_string, "<STR_LIT>")<EOL>
:return: 问题创建时间
:rtype: datetime.datetime