1
我有一个小应用程序,其中一个协程将发送数据,另一个协程将接收数据并记录它是否收到确切的传输数据。为什么python asyncio协程暂停在socket.recv(1024)行?为什么while循环无法通过yeild语句?
两个协程都在while循环中。一些如何,反式()协同程序和recv()协同程序不继续前进,当他们打线的产量从XXXXXXX
data, server = yield from recv_sock.recvfrom(1024)
下面是代码
import asyncio
import socket
import time
import datetime
import logging
trans_addr = ('localhost', 5555)
recv_addr = ('localhost',6666)
@asyncio.coroutine
def trans():
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
sock.bind(trans_addr)
i = 0
global sen_data
while True:
print("hi")
sen_data = "HELLO " + str(i)
sent = yield from sock.sendto(sen_data.encode(), recv_addr)
print(sent)
print("hi1")
yield from time.sleep(2)
i += 1
print("hi1")
@asyncio.coroutine
def recv():
recv_sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
recv_sock.bind(recv_addr) # binding the receiving end to 1.241 and port 6666
#recv_sock.setblocking(0)
while True:
try:
print("hello")
data, server = yield from recv_sock.recvfrom(1024)
print("hello2")
if (data):
recv_data = data.decode()
if (sen_data == recv_data):
logging.info("transmitted data :" + sen_data + " is Received as :" + recv_data + " at :" + str(
datetime.datetime.now()) + '\n')
print("transmitted data :" + sen_data + " is Received as :" + recv_data + " at :" + str(
datetime.datetime.now()) + " from :" + str(server) + '\n')
else:
logging.critical("Data missed : ")
logging.critical("Transmitted data " + sen_data + " is != " + "received data : " + recv_data + '\n')
print("data is missing--->")
print("Transmitted data " + sen_data + " is != " + "received data : " + recv_data + '\n')
except:
pass
# print("not receiving data due to some fault in the receiving socket")
# time.sleep(1)
loop=asyncio.get_event_loop()
tasks = [loop.create_task(trans()), loop.create_task(recv())]
wait_tasks = asyncio.wait(tasks)
loop.run_forever()
loop.run_until_complete(wait_tasks)
输出是:
hello
hi
任何人都可以让我知道,为什么协程无法跨越命令的收益?我正在使用python 3.3.2
如果recvfrom的是不是一个协同程序,然后如果我想执行通过套接字接收数据作为协程 - 你的建议是使用loop.sock_recv()。但是,如果我不想将循环作为参数传递给协程,该怎么办?我无法理解,为什么loop通过套接字接收数据时进入了图片。你能详细解释一下吗?我是这个Python世界的新手。 @Udi – ringul
请将此作为一个新问题提问 – Udi
@ringul:因为loop是一个全局变量,所以您可以在代码中的任何位置使用它,而不必将其作为一个paramarter传递。 – Udi