wxPython Frame Class Errors

Newbie Help
#1 
import wx
import wx.dataview as dv
    
class ExMain(wx.Frame):


    cnx = None
    index = 0

    def __init__(self):

        wx.Frame.__init__(self, wx.ID_ANY, "Title", wx.DefaultPosition, (400,400), wx.DEFAULT_FRAME_STYLE, "Simulator Main")

if __name__ == '__main__':
    app = wx.App()
    frame = NRTSimMain().Show()
    app.MainLoop()

When I run this I am getting the following errors:

frame = NRTSimMain().Show()
File ".\NRTSim-Main.py", line 13, in __init__
wx.Frame.__init__(self, wx.ID_ANY, "Title", wx.DefaultPosition, (350,200), wx.DEFAULT_FRAME_STYLE, "NRT Sorter Sim Main")

TypeError: Frame(): arguments did not match any overloaded call:
overload 1: too many arguments
overload 2: argument 1 has unexpected type 'StandardID'

I have tried myriad overloads with no avail. I really just want to dictate the initial size and position. This Frame is the default for the App.

#2

You didn’t pass a parent parameter to wx.Frame.__init__. It can be None for top-level windows, but it is required.

#3

Isn’t that the ‘self’ parameter being the highest level visual object in the class.

#4

Nope. On that line self is this frame instance, not the parent window that it should be a child of. When you invoke the unbound wx.Frame.__init__ then you need to explicitly pass the object reference that is the instance of the class itself, aka self. It is not implicitly passed for you.

#5

So do I have to specifically state the parent parameter=self?

#6

No, just add an extra parameter, like this:

    def __init__(self):
        wx.Frame.__init__(self, None, wx.ID_ANY, "Title", wx.DefaultPosition, (400,400), wx.DEFAULT_FRAME_STYLE, "Simulator Main")
#7

After making my code look like your example I am seeing failure on execution I don’t understand:

Traceback (most recent call last):
File “.\Simulator-mysql.py”, line 7, in
self.panel = wx.Panel(self, wx.ID_ANY)
NameError: name ‘self’ is not defined

#8

Please show your code.

#9

My apologies, I figured it out. I am relatively new to Python/wx & struggle with indentation. I used a beautify tool that jammed some stuff together and caused some headaches. After painstakingly combing line by line to ensure indetation is correct, all the problems went away. Now I am trying to use sizers with a combination of components, such as textCtrl’s and gridview stuff. When I put a grid view into a stack of horizontal sizer boxes into a vertical sizer box, if one of the horizontals is the listctrl, I’m having trouble making the listCtrl show up with enought size to see things inside.