函数计算的 Python手册小问题

今天跟着 函数计算 Python 入门手册 一起做，被卡在下图这里报错。在关于 WSGI 普通入口函数介绍中：

 {
   "errorMessage": "'NoneType' object has no attribute 'split'",
   "errorType": "AttributeError",
   "stackTrace": [
      [
         "File \"/var/fc/runtime/python2.7/src/server.py\"",
         "line 276",
         "in do_POST",
         "wsgi_handler.run(application)"
      ],
      [
         "File \"/usr/local/lib/python2.7/wsgiref/handlers.py\"",
         "line 92",
         "in run",
         "self.close()"
      ],
      [
         "File \"/usr/local/lib/python2.7/wsgiref/simple_server.py\"",
         "line 33",
         "in close",
         "self.status.split(' ',1)[0], self.bytes_sent"
      ]
   ]
} 

参考 简单的WSGI例子 - CSDN 加入这句 context('200 OK', [('Content-Type', 'text/html')])

def handler(event, context):
    context('200 OK', [('Content-Type', 'text/html')])
    return '<h1>Hello, web!</h1>'

即可。