import sys, time
from threading import Thread
from PyQt4.QtCore import *
from PyQt4.QtGui import *
class Gui(QWidget):
    def __init__(self):
        super().__init__()
        self.btn = QPushButton(self,text='Click')
        self.btn.clicked.connect(self.btn_click)
        self.loginLabel = QLabel(self,text='Login:')
        self.passwdLabel = QLabel(self,text='Password:')
        self.login = QLineEdit(self)
        self.passwd = QLineEdit(self)
        self.layout = QGridLayout(self)
        self.layout.addWidget(self.loginLabel, 0, 0)
        self.layout.addWidget(self.login, 0, 1)
        self.layout.addWidget(self.passwdLabel, 1, 0)
        self.layout.addWidget(self.passwd, 1, 1)
        self.layout.addWidget(self.btn, 2, 0,1,2)
        self.show()
    def btn_click(self):
        login = self.login.text()
        passwd = self.passwd.text()
        if login and passwd:
            p = Thread(target=self.auth, args=(login, passwd))
            p.start()
        else:
            print('login or password empty')
    def auth(self,login, passwd):
        for i in range (10):
            print( 'trying connect to server with login: {} passwd: {}'.format(login, passwd))
            time.sleep(1)
        print('connection established with login: {} passwd: {}'.format(login, passwd))
if __name__ == '__main__':
    myApp = QApplication(sys.argv)
    gui = Gui()
    sys.exit(myApp.exec_())