问题：使用tornado yield时出错tornado.gen.BadYieldError: yielded unknown object <generator object post at 0x7f1e870d7258>
解决：在方法上加上装饰器@gen.coroutine
方法：
from tornado import gen
class ApiCreateHandler(BaseHandler):
@login_required(7)
@gen.coroutine
def post(self):
... ...