Python Tkinter check radio button state before proceed

[davidbr]

Hello,
I have this code which is working

import Tkinter as tk
from Tkinter import *


LARGE_FONT= ("Verdana", 12)

class ChangePages(tk.Tk):

    def __init__(self, *args, **kwargs):

        tk.Tk.__init__(self, *args, **kwargs)
        container = tk.Frame(self)
        container.pack()
        container.grid_rowconfigure(0, weight=1)
        container.grid_columnconfigure(0, weight=1)
        self.frames = {}
        for F in (MainPage, Page01, Page02):

            frame = F(container, self)

            self.frames[F] = frame

            frame.grid(row=0, column=0, sticky="nsew")

        self.show_frame(MainPage)

    def show_frame(self, cont):

        frame = self.frames[cont]
        frame.tkraise()

#MainPage
class MainPage(tk.Frame):

    def __init__(self, parent, controller):
        tk.Frame.__init__(self,parent)

        button1=Button(self,text='Go To Page 1',fg='blue',font=('Helvetica',26),height=5, width=20,command=lambda: controller.show_frame(Page01)).grid(row=1,column=1)

#Page01
class Page01(tk.Frame):

    def __init__(self, parent, controller):

        option1 = IntVar()
        option2 = IntVar()
        option3 = IntVar()

        tk.Frame.__init__(self, parent)
        f = Frame(self)
        f.pack(side='left')

        label1=Label(f,text='Select options',fg='blue', font=("Arial", 36, "bold"),width=54, relief='solid').grid(row=1,column=1,columnspan=3)

        labelspacing=Label(f,text='Option 1 ',font=("Arial", 18, "bold"),width=20,height=1).grid(row=2,column=1)
        labelspacing=Label(f,text='Option 2 ',font=("Arial", 18, "bold"),width=20,height=1).grid(row=2,column=2)
        labelspacing=Label(f,text='Option 3',font=("Arial", 18, "bold"),width=20,height=1).grid(row=2,column=3)

        buttonoption11=Radiobutton(f, text="Option 1 - A", variable=option1, value=1, indicatoron=0, fg='blue',font=('Helvetica',26),height=1, width=20).grid(row=3,column=1)
        buttonoption21=Radiobutton(f, text="Option 2 - A", variable=option2, value=1, indicatoron=0, fg='blue',font=('Helvetica',26),height=1, width=20).grid(row=3,column=2)
        buttonoption31=Radiobutton(f, text="Option 3 - A", variable=option3, value=1, indicatoron=0, fg='blue',font=('Helvetica',26),height=1, width=20).grid(row=3,column=3)

        buttonoption12=Radiobutton(f, text="Option 1 - B", variable=option1, value=2, indicatoron=0, fg='blue',font=('Helvetica',26),height=1, width=20).grid(row=4,column=1)
        buttonoption22=Radiobutton(f, text="Option 2 - B", variable=option2, value=2, indicatoron=0, fg='blue',font=('Helvetica',26),height=1, width=20).grid(row=4,column=2)
        buttonoption32=Radiobutton(f, text="Option 3 - B", variable=option3, value=2, indicatoron=0, fg='blue',font=('Helvetica',26),height=1, width=20).grid(row=4,column=3)

        buttonoption23=Radiobutton(f, text="Option 2 - C", variable=option2, value=3, indicatoron=0, fg='blue',font=('Helvetica',26),height=1, width=20).grid(row=5,column=2)

        buttonnback=Button(f,text='Back',fg='blue',font=('Helvetica',26),height=1,width=15,command=lambda: controller.show_frame(MainPage)).grid(row=10,column=1)
        buttonnext=Button(f,text='Next',fg='blue',font=('Helvetica',26),height=3,width=15,command=lambda: controller.show_frame(Page02)).grid(row=10,column=2)

#Page02
class Page02(tk.Frame):

    def __init__(self, parent, controller):
        tk.Frame.__init__(self, parent)
        label = tk.Label(self, text="Page 02!!!", font=LARGE_FONT)
        label.pack(pady=10,padx=10)

        button1 = tk.Button(self, text="Back to Home",
                            command=lambda: controller.show_frame(MainPage))
        button1.pack()

        button2 = tk.Button(self, text="Page 01",
                            command=lambda: controller.show_frame(PageSub35t))
        button2.pack()


#Root loop
app = ChangePages()
app.mainloop()

What i want to do and this is reason for asking help is :

When press next in pag01 ,i want to check states of radio buttons. For example if user choose "Option 1 -A" and "Option 2 -C" I want to popup a message saying "You are not allowed to chose 2c! you can choose 2c only if 1B is selected" and not let him to go to page02.

Thank you in advance

[Gribouillis]

There is a better way: you can disable 2C when 1A is on. In the following code, I added a callback method, which is called when one of the options is selected. It is a very good way to prohibit some choices. It is completely configurable.
This code needs to be completed, I only started the refactoring, but it already works.
Compare it to your code with a diff visualizer such as meld or kdiff3 or winmerge, etc.

import Tkinter as tk
from Tkinter import *
from functools import partial


LARGE_FONT= ("Verdana", 12)

class ChangePages(tk.Tk):

    def __init__(self, *args, **kwargs):

        tk.Tk.__init__(self, *args, **kwargs)
        container = tk.Frame(self)
        container.pack()
        container.grid_rowconfigure(0, weight=1)
        container.grid_columnconfigure(0, weight=1)
        self.frames = {}
        for F in (MainPage, Page01, Page02):

            frame = F(container, self)

            self.frames[F] = frame

            frame.grid(row=0, column=0, sticky="nsew")

        self.show_frame(MainPage)

    def show_frame(self, cont):

        frame = self.frames[cont]
        frame.tkraise()

#MainPage
class MainPage(tk.Frame):

    def __init__(self, parent, controller):
        tk.Frame.__init__(self,parent)

        button1=Button(self,text='Go To Page 1',fg='blue',font=('Helvetica',26),height=5, width=20,command=lambda: controller.show_frame(Page01)).grid(row=1,column=1)

#Page01
class Page01(tk.Frame):

    def __init__(self, parent, controller):

        self.option1 = option1 = IntVar()
        self.option2 = option2 = IntVar()
        self.option3 = option3 = IntVar()

        tk.Frame.__init__(self, parent)
        f = Frame(self)
        f.pack(side='left')

        label1=Label(f,text='Select options',fg='blue', font=("Arial", 36, "bold"),width=54, relief='solid').grid(row=1,column=1,columnspan=3)

        labelspacing=Label(f,text='Option 1 ',font=("Arial", 18, "bold"),width=20,height=1).grid(row=2,column=1)
        labelspacing=Label(f,text='Option 2 ',font=("Arial", 18, "bold"),width=20,height=1).grid(row=2,column=2)
        labelspacing=Label(f,text='Option 3',font=("Arial", 18, "bold"),width=20,height=1).grid(row=2,column=3)

        def C(*args): return partial(self.option_changed, *args)

        buttonoption11=Radiobutton(f, text="Option 1 - A", variable=option1, value=1, indicatoron=0, fg='blue',font=('Helvetica',26),height=1, width=20, command=C(1,'A')).grid(row=3,column=1)
        buttonoption21=Radiobutton(f, text="Option 2 - A", variable=option2, value=1, indicatoron=0, fg='blue',font=('Helvetica',26),height=1, width=20, command=C(2,'A')).grid(row=3,column=2)
        buttonoption31=Radiobutton(f, text="Option 3 - A", variable=option3, value=1, indicatoron=0, fg='blue',font=('Helvetica',26),height=1, width=20, command=C(3,'A')).grid(row=3,column=3)

        buttonoption12=Radiobutton(f, text="Option 1 - B", variable=option1, value=2, indicatoron=0, fg='blue',font=('Helvetica',26),height=1, width=20, command=C(1,'B')).grid(row=4,column=1)
        buttonoption22=Radiobutton(f, text="Option 2 - B", variable=option2, value=2, indicatoron=0, fg='blue',font=('Helvetica',26),height=1, width=20, command=C(2,'B')).grid(row=4,column=2)
        buttonoption32=Radiobutton(f, text="Option 3 - B", variable=option3, value=2, indicatoron=0, fg='blue',font=('Helvetica',26),height=1, width=20, command=C(3,'B')).grid(row=4,column=3)

        self.buttonoption23=Radiobutton(f, text="Option 2 - C", variable=option2, value=3, indicatoron=0, fg='blue',font=('Helvetica',26),height=1, width=20, command=C(2,'C'))
        self.buttonoption23.grid(row=5,column=2)

        buttonnback=Button(f,text='Back',fg='blue',font=('Helvetica',26),height=1,width=15,command=lambda: controller.show_frame(MainPage)).grid(row=10,column=1)
        buttonnext=Button(f,text='Next',fg='blue',font=('Helvetica',26),height=3,width=15,command=lambda: controller.show_frame(Page02)).grid(row=10,column=2)

    def option_changed(self, number, letter, *args, **kwd):
        print(number, letter)
        if self.option1.get() == 1:
            self.buttonoption23.config(state=tk.DISABLED)
            if self.option2.get() == 3:
                self.option2.set(0)
        else:
            self.buttonoption23.config(state=tk.NORMAL)

#Page02
class Page02(tk.Frame):

    def __init__(self, parent, controller):
        tk.Frame.__init__(self, parent)
        label = tk.Label(self, text="Page 02!!!", font=LARGE_FONT)
        label.pack(pady=10,padx=10)

        button1 = tk.Button(self, text="Back to Home",
                            command=lambda: controller.show_frame(MainPage))
        button1.pack()

        button2 = tk.Button(self, text="Page 01",
                            command=lambda: controller.show_frame(PageSub35t))
        button2.pack()


#Root loop
app = ChangePages()
app.mainloop()

[davidbr]

Thank you very much