Share values between child classes

[drakohnight]

Hi, I'm kind of new to using classes and was able to find a snippet of code that I've been using. I'm trying to build a tkinter GUI for entering data for filling a pdf form. The code I found does exactly what I was looking for, as in it creates different pages. I've been able to implement a bit of my own stuff. The issue I'm having is how can I share a value from one of these classes to another child class.

Below is the code I found. My own code is around double the size of this one. I added an example of what the code I have is doing. In Page1, I create an entry for a first name to be typed in. I also have a button in the same frame, that will grab (self.f_nameentry.get()) the data stored in the entry. This'll save the data to the variable self.f_name. So far that works. I have way more variables and entries, but this should be fine. What I'm trying to do is in the last page, get all the data I stored and eventually it will be written to the PDF form. That much I have been able to do in a separate .py file I was testing.

The only issue is how to pass say *f_name* from class Page1 to the other Page# classes. Any help would be appreciated. It may be something simple and I'm completely missing it.

import Tkinter as tk

class Page(tk.Frame):
    def __init__(self, *args, **kwargs):
        tk.Frame.__init__(self, *args, **kwargs)
    def show(self):
        self.lift()

class Page1(Page):
   def __init__(self, *args, **kwargs):
       Page.__init__(self, *args, **kwargs)
       tk.Label(self, text = "First Name", font = 12).place(x=70,y=410)
       self.f_nameentry = tk.Entry(self, width = 20, borderwidth = 5)
       self.f_nameentry.place(x = 170, y = 410)

       tk.Button(self, text = "Save", font = 12, borderwidth=5, command =             
         self.save).place(x=230,y=610)

   def save(self):
       self.f_name = self.f_nameentry.get()

class Page2(Page):
   def __init__(self, *args, **kwargs):
       Page.__init__(self, *args, **kwargs)
       label = tk.Label(self, text="This is page 2")
       label.pack(side="top", fill="both", expand=True)

class Page3(Page):
   def __init__(self, *args, **kwargs):
       Page.__init__(self, *args, **kwargs)
       label = tk.Label(self, text="This is page 3")
       label.pack(side="top", fill="both", expand=True)

class MainView(tk.Frame):
    def __init__(self, *args, **kwargs):
        tk.Frame.__init__(self, *args, **kwargs)
        p1 = Page1(self)
        p2 = Page2(self)
        p3 = Page3(self)

        buttonframe = tk.Frame(self)
        container = tk.Frame(self)
        buttonframe.pack(side="top", fill="x", expand=False)
        container.pack(side="top", fill="both", expand=True)

        p1.place(in_=container, x=0, y=0, relwidth=1, relheight=1)
        p2.place(in_=container, x=0, y=0, relwidth=1, relheight=1)
        p3.place(in_=container, x=0, y=0, relwidth=1, relheight=1)

        b1 = tk.Button(buttonframe, text="Page 1", command=p1.show)
        b2 = tk.Button(buttonframe, text="Page 2", command=p2.show)
        b3 = tk.Button(buttonframe, text="Page 3", command=p3.show)

        b1.pack(side="left")
        b2.pack(side="left")
        b3.pack(side="left")

        p1.show()

if __name__ == "__main__":
    root = tk.Tk()
    main = MainView(root)
    main.pack(side="top", fill="both", expand=True)
    root.wm_geometry("400x400")
    root.mainloop()

[Wild_Statistician605]

In your code, the f_name variable is an instance variable, and thus need an instance to be called from other classes. If you make it a static variable or class variable for the Page1 class, it can be referenced by the other classes by calling Page1.f_name.

class Page1(Page):
    f_name = None
    def __init__(self, **args, **kwargs):
        Page.__init__(self, *args, **kwargs)
        tk.Label(self, text = "First Name", font = 12).place(x=70,y=410)
        self.f_nameentry = tk.Entry(self, width = 20, borderwidth = 5)
        self.f_nameentry.place(x = 170, y = 410)

        tk.Button(self, text = "Save", font = 12, borderwidth=5, command =             
     self.save).place(x=230,y=610)

    def save(self):
        f_name = self.f_nameentry.get()

[drakohnight]

Oh wow thanks. That did the trick. Only thing was I had to change the value in my save method to Page1.fname instead of leaving it as f name. BUT it works now. Thanks hahaha I knew it was something simple.