pyQt QWizard change next to finish button to exit early - pyqt

Question

Is there a way to change a next button to a finish button mid-way through a wizard if user has entered sufficient data?
The example below uses the HaveFinishButtonOnEarlyPages set - however what I'd like to do is replace the next button with a finish button if user selects a radiobutton. Is this possible?
from PyQt4 import QtGui
from PyQt4.QtGui import QWizard
import sys
def createPage1():
page = QtGui.QWizardPage()
page.setTitle("Page 1")
page.setSubTitle("Enter some data, if you don't want to enter any more data select finish early.")
essentialLabel = QtGui.QLabel("Essential data:")
essentialLineEdit = QtGui.QLineEdit()
finishEarlyRB = QtGui.QRadioButton("Select to finish wizard early")
layout = QtGui.QGridLayout()
layout.addWidget(essentialLabel, 0, 0)
layout.addWidget(essentialLineEdit, 0, 1)
layout.addWidget(finishEarlyRB, 1, 0)
page.setLayout(layout)
return page
def createPage2():
page = QtGui.QWizardPage()
page.setTitle("Page 2")
page.setSubTitle("Enter some more data.")
nonEssentialLabel = QtGui.QLabel("Non essential data:")
nonEssentialLineEdit = QtGui.QLineEdit()
layout = QtGui.QGridLayout()
layout.addWidget(nonEssentialLabel, 0, 0)
layout.addWidget(nonEssentialLineEdit, 0, 1)
page.setLayout(layout)
return page
if __name__ == '__main__':
app = QtGui.QApplication(sys.argv)
wizard = QtGui.QWizard()
wizard.setOption(QWizard.HaveFinishButtonOnEarlyPages, on=True)
wizard.addPage(createPage1())
wizard.addPage(createPage2())
wizard.show()
sys.exit(wizard.exec_())

Answer 1

Thanks to figs I recoded this so that the user has a next and finish button. The finish button is enabled when certain conditions on the page are met as per below.
from PyQt4 import QtGui
from PyQt4.QtGui import QWizard, QWizardPage
import sys
class TrialWizard(QWizard):
def __init__(self, parent = None):
super(QWizard, self).__init__(parent)
self.setOption(QWizard.HaveFinishButtonOnEarlyPages, on=True)
self.addPage(TrialWizardPage1(self))
self.addPage(TrialWizardPage2(self))
class TrialWizardPage1(QWizardPage):
def __init__(self, parent):
super(TrialWizardPage1, self).__init__(parent)
self.setupUi()
self.connectSlots()
def setupUi(self):
self.setTitle("Page 1")
self.setSubTitle("Enter some data, if you don't want to enter any more data select finish early.")
essentialLabel = QtGui.QLabel("Essential data:")
self.essentialLineEdit = QtGui.QLineEdit()
self.finishEarlyRB = QtGui.QRadioButton("Select to finish wizard early")
layout = QtGui.QGridLayout()
layout.addWidget(essentialLabel, 0, 0)
layout.addWidget(self.essentialLineEdit, 0, 1)
layout.addWidget(self.finishEarlyRB, 1, 0)
self.setLayout(layout)
def isComplete(self):
if len(self.essentialLineEdit.text()) > 0:
return True
else:
return False
def connectSlots(self):
self.finishEarlyRB.clicked.connect(self.finishEarlyRBClicked)
def finishEarlyRBClicked(self):
if self.finishEarlyRB.isChecked():
self.setFinalPage(True)
self.completeChanged.emit()
class TrialWizardPage2(QWizardPage):
def __init__(self, parent):
super(TrialWizardPage2, self).__init__(parent)
self.setupUi()
def setupUi(self):
self.setTitle("Page 2")
self.setSubTitle("Enter some more data.")
nonEssentialLabel = QtGui.QLabel("Non essential data:")
nonEssentialLineEdit = QtGui.QLineEdit()
layout = QtGui.QGridLayout()
layout.addWidget(nonEssentialLabel, 0, 0)
layout.addWidget(nonEssentialLineEdit, 0, 1)
self.setLayout(layout)
if __name__ == '__main__':
app = QtGui.QApplication(sys.argv)
wizard = TrialWizard()
wizard.show()
sys.exit(app.exec_())