RuntimeError: Cannot run the event loop while another loop is running(目前没有解决)
代码如下:
import tornado.ioloop
import tornado.web
from tornado.httpclient import HTTPClient, AsyncHTTPClient
class MainHandler(tornado.web.RequestHandler):
# 同步
def get(self):
h_c = HTTPClient()
res = h_c.fetch("http://www.baidu.com")
# print(res)
# pass
self.write("Hello, world")
class TestHandler(tornado.web.RequestHandler):
# 异步
async def get(self):
http_client = AsyncHTTPClient()
try:
res = await http_client.fetch("http://www.baidu.com")
except Exception as e:
print("Error: %s" % e)
else:
pass
self.write("Hello, world1")
def make_app():
return tornado.web.Application([
(r"/test", TestHandler),
(r"/", MainHandler),
])
if __name__ == "__main__":
app = make_app()
app.listen(8888)
tornado.ioloop.IOLoop.current().start()
浏览器打开:
http://127.0.0.1:8888/
完整报错:
ERROR:tornado.application:Uncaught exception GET / (127.0.0.1)
HTTPServerRequest(protocol='http', host='127.0.0.1:8888', method='GET', uri='/', version='HTTP/1.1', remote_ip='127.0.0.1')
Traceback (most recent call last):
File "/home/appleyuchi/anaconda3/envs/Python3.6/lib/python3.6/site-packages/tornado/web.py", line 1590, in _execute
result = method(*self.path_args, **self.path_kwargs)
File "test.py", line 8, in get
h_c = HTTPClient()
File "/home/appleyuchi/anaconda3/envs/Python3.6/lib/python3.6/site-packages/tornado/httpclient.py", line 95, in __init__
gen.coroutine(lambda: async_client_class(**kwargs)))
File "/home/appleyuchi/anaconda3/envs/Python3.6/lib/python3.6/site-packages/tornado/ioloop.py", line 571, in run_sync
self.start()
File "/home/appleyuchi/anaconda3/envs/Python3.6/lib/python3.6/site-packages/tornado/platform/asyncio.py", line 132, in start
self.asyncio_loop.run_forever()
File "/home/appleyuchi/anaconda3/envs/Python3.6/lib/python3.6/asyncio/base_events.py", line 432, in run_forever
'Cannot run the event loop while another loop is running')
RuntimeError: Cannot run the event loop while another loop is running
ERROR:tornado.access:500 GET / (127.0.0.1) 3.29ms
作者：Applied Sciences
