在下面的例子中:
import asyncio
import ipdb
class EchoServerProtocol:
def connection_made(self, transport):
self.transport = transport
def datagram_received(self, data, addr):
message = data.decode()
print('Received %r from %s' % (message, addr))
print('Send %r to %s' % (message, addr))
self.transport.sendto(data, addr)
loop = asyncio.get_event_loop()
ipdb.set_trace(context=21)
print("Starting UDP server")
# One protocol instance will be created to serve all client requests
listen = loop.create_datagram_endpoint( EchoServerProtocol, local_addr=('127.0.0.1', 9999))
transport, protocol = loop.run_until_complete(listen)
try:
loop.run_forever()
except KeyboardInterrupt:
pass
transport.close()
loop.close()
我正试图进入
loop.create_datagram_endpoint( EchoServerProtocol, local_addr=('127.0.0.1', 9999))
了解它在内部的表现。
但是,当我尝试进入协程时,调试器只是跳过它,就像按下n
而不是s
一样。
> ../async_test.py(18)<module>()
17 # One protocol instance will be created to serve all client requests
---> 18 listen = loop.create_datagram_endpoint( EchoServerProtocol, local_addr=('127.0.0.1', 9999))
19 transport, protocol = loop.run_until_complete(listen)
ipdb> s
> ../async_test.py(19)<module>()
18 listen = loop.create_datagram_endpoint( EchoServerProtocol, local_addr=('127.0.0.1', 9999))
---> 19 transport, protocol = loop.run_until_complete(listen)
20
ipdb>
PyCharm(2016 2.3社区)IDE会体验到这种行为。
我希望结束here并能够在代码中另外执行。
答案 0 :(得分:4)
如果您为您的协程调用await
或yield from
listen = await loop.create_datagram_endpoint(EchoServerProtocol,
local_addr=('127.0.0.1', 9999))
在您的示例中,listen
不是协程执行的结果,而是协程实例本身。
实际执行由下一行执行:loop.run_until_complete()
。