[zguide]pyzmq发布不工作

Question

我从github下载zguide源代码。我发现python示例代码-wuserver.py不起作用。运行wuserver.py和wuclient.py，wuclient.py不能恢复任何数据，但是如果我运行c代码-wuserver.c，wuclient.py可以恢复数据。

wuserver.py

#
#   Weather update server
#   Binds PUB socket to tcp://*:5556
#   Publishes random weather updates
#

import zmq
from random import randrange


context = zmq.Context()
socket = context.socket(zmq.PUB)
socket.bind("tcp://*:5556")

while True:
    zipcode = randrange(1, 100000)
    temperature = randrange(-80, 135)
    relhumidity = randrange(10, 60)

    socket.send_string("%i %i %i" % (zipcode, temperature, relhumidity))

wuclient.py

#
#   Weather update client
#   Connects SUB socket to tcp://localhost:5556
#   Collects weather updates and finds avg temp in zipcode
#

import sys
import zmq


#  Socket to talk to server
context = zmq.Context()
socket = context.socket(zmq.SUB)

print("Collecting updates from weather server...")
socket.connect("tcp://localhost:5556")

# Subscribe to zipcode, default is NYC, 10001
zip_filter = sys.argv[1] if len(sys.argv) > 1 else "10001"

# Python 2 - ascii bytes to unicode str
if isinstance(zip_filter, bytes):
    zip_filter = zip_filter.decode('ascii')
socket.setsockopt_string(zmq.SUBSCRIBE, zip_filter)

# Process 5 updates
total_temp = 0
for update_nbr in range(5):
    string = socket.recv_string()
    zipcode, temperature, relhumidity = string.split()
    total_temp += int(temperature)

print("Average temperature for zipcode '%s' was %dF" % (
      zip_filter, total_temp / update_nbr)
)

Answer 1

我试过了，没出什么问题。您可以修改wuclient.py代码以查看已转移的内容：

for update_nbr in range(5):
    string = socket.recv_string()
    zipcode, temperature, relhumidity = string.split()
    print(string)    # add this statement
    total_temp += int(temperature)

然后，您应该首先运行wuclient.py ，然后运行wuserver.py。

P.S.：zguide文档提供了一个非常清晰的方法来调试丢失的消息问题，这可能非常有帮助。这是丢失消息问题解决器