import select
import socket

from PySide2 import QtCore


class Test:

    def on_read(self):
        print('on read')

    def on_write(self):
        print('on write')

    def on_error(self):
        print('on error')

    def create_connection(self):
        self.sock = socket.socket()
        print(self.sock)
        fd = self.sock.fileno()
        self.sock.setblocking(False)

        try:
            self.sock.connect(('0.0.0.0', 1234))
        except BlockingIOError:
            pass

        self.read_notifier = QtCore.QSocketNotifier(
            fd, QtCore.QSocketNotifier.Read)
        self.read_notifier.activated.connect(self.on_read)

        self.write_notifier = QtCore.QSocketNotifier(
            fd, QtCore.QSocketNotifier.Write)
        self.write_notifier.activated.connect(self.on_write)

        self.error_notifier = QtCore.QSocketNotifier(
            fd, QtCore.QSocketNotifier.Exception)
        self.error_notifier.activated.connect(self.on_error)

    def on_timeout(self):
        timeout = 0.1
        fd = self.sock.fileno()
        r, w, e = select.select([fd], [fd], [fd], timeout)
        print(r, w, e)

    def run(self):
        app = QtCore.QCoreApplication()
        self.create_connection()
        self.timer = QtCore.QTimer()
        self.timer.timeout.connect(self.on_timeout)
        self.timer.start(1000)
        app.exec_()


def main():
    Test().run()


if __name__ == '__main__':
    main()