How to call another class with button and pass variable between classes?

Question

I want to pass variable between GUI classes. Below, when i Show Other_b class, it Show frame but i couldn't get Main1 class' data to there. However when i try to Show Other_a class, it passes x value (because of it is inside of __init__) but it doesn't pass the y value because of it is related to Btn2(and of course because of not having any frame to pressing button).

How can i overcome this problem? Any help would be appreciated.

import wx

class Main1 (wx.Frame):
    def __init__(self,parent):
        wx.Frame.__init__ ( self, parent )
        self.bSizer1 = wx.BoxSizer( wx.VERTICAL )
        self.Btn1 = wx.Button( self, wx.ID_ANY, u"Btn1", wx.DefaultPosition, wx.DefaultSize, 0 )
        self.bSizer1.Add( self.Btn1, 1, wx.ALL|wx.EXPAND, 5 )
        self.SetSizer( self.bSizer1 )
        self.Btn1.Bind( wx.EVT_BUTTON, self.btn1_f )


    def btn1_f( self, event ):
        print("here 1")
        self.x = 12
        self.y = 30

        a=Other_a(self).Show()
        b=Other_b(self).Show()


class Other_a (wx.Frame):
    def __init__(self, foo):
        wx.Frame.__init__ ( self )
        self.bSizer2 = wx.BoxSizer( wx.VERTICAL )
        self.Btn2 = wx.Button( self, wx.ID_ANY, u"Btn 2", wx.DefaultPosition, wx.DefaultSize, 0 )
        self.bSizer2.Add( self.Btn2, 0, wx.ALL|wx.EXPAND, 5 )
        self.SetSizer( self.bSizer2 )
        self.Btn2.Bind( wx.EVT_BUTTON, self.btn2_f )

        print("here 2")
        print(foo.x)

    def btn2_f(self,foo):
        print("here 3")
        print(foo.y)

class Other_b (wx.Frame):
    def __init__(self,parent):
        wx.Frame.__init__ ( self, parent )
        self.bSizer3 = wx.BoxSizer( wx.VERTICAL )
        self.Btn3 = wx.Button( self, wx.ID_ANY, u"Btn 2", wx.DefaultPosition, wx.DefaultSize, 0 )
        self.bSizer3.Add( self.Btn3, 0, wx.ALL|wx.EXPAND, 5 )
        self.SetSizer( self.bSizer3 )
        self.Btn3.Bind( wx.EVT_BUTTON, self.btn3_f )
        print("here 4")

    def btn3_f(self,event):
        print("here 5")
        print(self.x)


if __name__ == "__main__":
    app = wx.App(False)
    frame = Main1(None)
    frame.Show(True)
    app.MainLoop()

Answer 1

You are very close!
A few judicious uses of self and parent resolve your issues.

import wx

class Main1 (wx.Frame):
    def __init__(self,parent):
        wx.Frame.__init__ ( self, parent )
        self.bSizer1 = wx.BoxSizer( wx.VERTICAL )
        self.Btn1 = wx.Button( self, wx.ID_ANY, u"Btn1", wx.DefaultPosition, wx.DefaultSize, 0 )
        self.bSizer1.Add( self.Btn1, 1, wx.ALL|wx.EXPAND, 5 )
        self.SetSizer( self.bSizer1 )
        self.Btn1.Bind( wx.EVT_BUTTON, self.btn1_f )


    def btn1_f( self, event ):
        print("here 1")
        self.x = 12
        self.y = 30

        a=Other_a(parent=self).Show()
        b=Other_b(parent=self).Show()


class Other_a (wx.Frame):
    def __init__(self, parent):
        wx.Frame.__init__ (self,parent)
        self.parent = parent
        self.bSizer2 = wx.BoxSizer( wx.VERTICAL )
        self.Btn2 = wx.Button( self, wx.ID_ANY, u"Btn A 2", wx.DefaultPosition, wx.DefaultSize, 0 )
        self.bSizer2.Add( self.Btn2, 0, wx.ALL|wx.EXPAND, 5 )
        self.SetSizer( self.bSizer2 )
        self.Btn2.Bind( wx.EVT_BUTTON, self.btn2_f )

        print("here 2")
        print(self.parent.x)

    def btn2_f(self,foo):
        print("here 3")
        print(self.parent.y)

class Other_b (wx.Frame):
    def __init__(self,parent):
        wx.Frame.__init__ ( self, parent )
        self.parent = parent
        self.bSizer3 = wx.BoxSizer( wx.VERTICAL )
        self.Btn3 = wx.Button( self, wx.ID_ANY, u"Btn B 2", wx.DefaultPosition, wx.DefaultSize, 0 )
        self.bSizer3.Add( self.Btn3, 0, wx.ALL|wx.EXPAND, 5 )
        self.SetSizer( self.bSizer3 )
        self.Btn3.Bind( wx.EVT_BUTTON, self.btn3_f )
        print("here 4")

    def btn3_f(self,event):
        print("here 5")
        print(self.parent.x)


if __name__ == "__main__":
    app = wx.App(False)
    frame = Main1(None)
    frame.Show(True)
    app.MainLoop()

Gives:

python 20190529.py
here 1
here 2
12
here 4
here 3
30
here 5
12

Here is the diff between your code and the code above:

<         a=Other_a(self).Show()
<         b=Other_b(self).Show()
---
>         a=Other_a(parent=self).Show()
>         b=Other_b(parent=self).Show()
23,24c23,25
<     def __init__(self, foo):
<         wx.Frame.__init__ ( self )
---
>     def __init__(self, parent):
>         wx.Frame.__init__ (self,parent)
>         self.parent = parent
26c27
<         self.Btn2 = wx.Button( self, wx.ID_ANY, u"Btn 2", wx.DefaultPosition, wx.DefaultSize, 0 )
---
>         self.Btn2 = wx.Button( self, wx.ID_ANY, u"Btn A 2", wx.DefaultPosition, wx.DefaultSize, 0 )
32c33
<         print(foo.x)
---
>         print(self.parent.x)
36c37
<         print(foo.y)
---
>         print(self.parent.y)
40a42
>         self.parent = parent
42c44
<         self.Btn3 = wx.Button( self, wx.ID_ANY, u"Btn 2", wx.DefaultPosition, wx.DefaultSize, 0 )
---
>         self.Btn3 = wx.Button( self, wx.ID_ANY, u"Btn B 2", wx.DefaultPosition, wx.DefaultSize, 0 )
50c52
<         print(self.x)
---
>         print(self.parent.x)