PyQT - Run script with button click after checkbox was selected

I have an issue trying to accomplish this situation.

I created a form with PyQt4 with a checkbox and a button. Program will run the script if you click execute and the checkbox has been toggle.

Can you please help me with that?

Sorry, Inglish is not my native lenguage

Thanks

enter image description here

import sys
from PyQt4 import QtGui, QtCore
import subprocess 

class Window(QtGui.QMainWindow):

def __init__(self):
    super(Window, self).__init__()
    self.setGeometry(200, 200, 200, 200)
    self.setWindowTitle("Learning")
    self.setWindowIcon(QtGui.QIcon('pythonlogo.png'))



    self.home()

def home(self):
    btn = QtGui.QPushButton("Execute", self)
    btn.clicked.connect(self.execute)
    btn.resize(btn.minimumSizeHint())
    btn.move(110,160)

    checkBox = QtGui.QCheckBox('Run script?', self)
    #checkBox.isChecked.connect(self)


    self.show()

def execute(self):
    if checkBox.isChecked():
        subprocess.Popen("script.py 1", shell=True)

def run():
    app = QtGui.QApplication(sys.argv)
    GUI = Window()
    sys.exit(app.exec_())

run()