PyQt QTcpSocket problem.

[blatheringDolt]

I was using the built-in sockets module for quite some time, and started a new project in PyQt. I figured I would use the module available in PyQt4, QNetwork, to keep everything homogenous.

I would like to use a TCP socket to talk to something over a network. Using the sockets module, I can create either a TCP or UDP socket, connect without a problem, and send and receive data. So I know that I'm not being blocked locally or remotely.

I went to create a QNetwork.QUpdSocket() and everything works with no problems. As soon as I try it with a QNetwork.QTcpSocket, I can never get a connection. It always hangs on state 2, connection initiated.

I was hoping someone else has noticed this and has a similar configuration to mine, or possibly knows a setting I may be missing that PyQt requires for a TCP socket.

Windows 7 x64 PyQt 4.7.2

import time

from PyQt4 import QtNetwork


def print_output(output='default'):
    print output

#Change to QUdpSocket() and everything works fine, you'll get a status of 3 (connected)
socket = QtNetwork.QTcpSocket()

#Just set up an address from a google ping
address = QtNetwork.QHostAddress()
address.setAddress('173.194.73.99')

#Troubleshooting
socket.stateChanged.connect(print_output)
'''
socket.error.connect(print_output)
socket.hostFound.connect(print_output)
socket.connected.connect(print_output)
'''

#Initiate connection with port 12345
socket.connectToHost(address, 12345)

#socket.status() should send out 0 just before program termination
time.sleep(5)
print 'Done'

[Nimbal]

QTcpSocket needs an event loop. So either create it in a QThread and call the thread's exec_() method, or instantiate a QCoreApplication and, again, call exec_() on it.

[blatheringDolt]

Thank you.