Python调试器没有进入协程?

时间:2016-09-14 16:35:16

标签: python-3.x pycharm python-asyncio ipdb

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。

1 个答案:

答案 0 :(得分:4)

如果您为您的协程调用awaityield from

,则此功能正常
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()