wxPython - Create Wizard with facility to change 'Next' page based on user choice

Question

I am trying to create a simple installer using the wxWizard class. On the first page (page0) I would like to have 3 options

 1. Install (click Next goes to page install1) 
 2. Upgrade (click Next goes to page upgrade1)
 3. Remove (click Next goes to page remove1)

Due to my lack of experience with OOP (and programming in general), I'm unable to understand how to create the page0 object that would do this.

If I create page0 before install1: global name 'install1' is not defined If I create install1 before page0: maximum recursion depth exceeded If I look at class SkipNextPage at http://xoomer.virgilio.it/infinity77/wxPython/wizard/wx.wizard.html: there is a funky GetNext() method that also don't understand.

Please help!

import wx
import wx.wizard

class InstallPage_Dyn(wx.wizard.PyWizardPage):
    def __init__(self, parent, title):
        wx.wizard.PyWizardPage.__init__(self, parent)
        self.next = self.prev = None


class InstallPage0(wx.wizard.PyWizardPage):
    def __init__(self, parent, title):
        wx.wizard.PyWizardPage.__init__(self, parent)
        self.next = self.prev = None
        self.box = wx.RadioBox (self, -1, 'Choose one of the options below and hit Next\n', choices=['Install','Upgrade','Remove'], style = wx.VERTICAL | wx.EXPAND)

        # Set Next button based on user choice
        self.box.Bind(wx.EVT_RADIOBOX, self.SetNext(install1))

    # Setter and getter methods to specify Next and Previous buttons#     
    def SetNext(self, next):
        userchoice = self.box.GetSelection()
        if userchoice == 0: 
            self.SetNext(install1)
        elif userchoice == 1:
            self.SetNext(upgrade1)
        elif userchoice == 2:
            self.SetNext(remove1)

    def SetPrev(self, prev):
        return self.prev

    def GetNext(self):
        return self.next

    def GetPrev(self):
        return self.prev


# Define application and create the wizard
app = wx.App()

wizard = wx.wizard.Wizard(None, -1, "Installer")
wizard.SetPageSize((500,350))

# User selected install. Create the pages
install1 = InstallPage_Dyn(wizard, "Install")
upgrade1 = InstallPage_Dyn(wizard, "Upgrade")
remove1 = InstallPage_Dyn(wizard, "Remove")

# Create page instances
page0 = InstallPage0(wizard, "Installer")

wizard.RunWizard(page0)

Answer 1

Try this

class InstallPage_Dyn(wx.wizard.PyWizardPage):
    def __init__(self, parent, title):
        wx.wizard.PyWizardPage.__init__(self, parent)
        self.title = wx.StaticText(self,-1,title)
        self.title.SetFont(wx.Font(40,wx.FONTFAMILY_DEFAULT,wx.FONTSTYLE_NORMAL,wx.FONTWEIGHT_BOLD))
        self.next = self.prev = None
    def SetPrev(self,prev):
        self.prev = prev
    def GetPrev(self):
        return self.prev

class InstallPage0(wx.wizard.PyWizardPage):
    def __init__(self, parent, title,optional_panels = {}):
        wx.wizard.PyWizardPage.__init__(self, parent)
        self.prev = self
        self.next = optional_panels.values()[0]
        self.box = wx.RadioBox (self, -1, 'Choose one of the options below and hit Next\n', choices=optional_panels.keys(), style = wx.VERTICAL | wx.EXPAND)
        self.opts = optional_panels.keys()
        self.pages   = optional_panels.values()
        for p in self.pages:
            p.SetPrev(self)
        self.next = self.pages[0]
        self.optional_panels = optional_panels

    def GetNext(self):
        return self.pages[self.box.GetSelection()]
    def GetPrev(self):
        return self.prev
...
page0 = InstallPage0(wizard, "Installer",{'install':install1,'upgrade':upgrade1,'remove':remove1})

wizard.RunWizard(page0)
#app.MainLoop()

here is the full code ... name it wiz.py and run it

import wx
import wx.wizard

class InstallPage_Dyn(wx.wizard.PyWizardPage):
    def __init__(self, parent, title):
        wx.wizard.PyWizardPage.__init__(self, parent)
        self._title = title
        self.title = wx.StaticText(self,-1,title)
        self.title.SetFont(wx.Font(40,wx.FONTFAMILY_DEFAULT,wx.FONTSTYLE_NORMAL,wx.FONTWEIGHT_BOLD))
        self.next = self.prev = None
    def SetPrev(self,prev):
        self.prev = prev
    def GetPrev(self):
        return self.prev

class InstallPage0(wx.wizard.PyWizardPage):
    def __init__(self, parent, title,optional_panels = {}):
        wx.wizard.PyWizardPage.__init__(self, parent)
        self.prev = self
        self.next = optional_panels[0]
        options = [p._title for p in optional_panels]
        self.box = wx.RadioBox (self, -1, 'Choose one of the options below and hit Next\n', choices=options, style = wx.VERTICAL | wx.EXPAND)
        self.pages   = optional_panels
        for p in self.pages:
            p.SetPrev(self)
        self.next = install1
        self.optional_panels = optional_panels
    def SetPrev(self, prev):
        self.prev = prev
        return self.prev
    def GetNext(self):
        return self.pages[self.box.GetSelection()]
    def GetPrev(self):
        return self.prev


# Define application and create the wizard
app = wx.App(redirect=False)

wizard = wx.wizard.Wizard(None, -1, "Installer")
wizard.SetPageSize((500,350))

# User selected install. Create the pages
install1 = InstallPage_Dyn(wizard, "Install")
upgrade1 = InstallPage_Dyn(wizard, "Upgrade")
remove1 = InstallPage_Dyn(wizard, "Remove")

# Create page instances
page0 = InstallPage0(wizard, "Installer",[install1,upgrade1,remove1])

wizard.RunWizard(page0)