How to create custom messagebox?

Solution for How to create custom messagebox?
is Given Below:

My MessageBox doesn’t give value in real time.
I’m trying to create a custom messagebox that gives values according to which button was pressed.

My code is working but it’s not giving me the value in real time.
Is there any way I can get the value in real time?
Where I’m not doing good, help me…I see a lot of people there don’t answer me and tell me the reason of it, too.

Basically I want to value like real messagebox of python tkinter. Like we create its object and it has the value according to which button was pressed – something like that. I hope you understand.

from tkinter import *

class MessageBox(object):

    def __init__(self,title="Mess", msg='', b1='OK', b2='',b3='',b4=''):

    # Required Data of Init Function
        self.title = title      # Is title of titlebar
        self.msg = msg          # Is message to display
        self.b1 = b1            # Button 1 (outputs '1')
        self.b2 = b2            # Button 2 (outputs '2')
        self.b3 = b3            # Button 3 (outputs '3')
        self.b4 = b4            # Button 4 (outputs '4')
        self.choice=""        # it will be the return of messagebox according to button press

    # Just the colors for my messagebox

        self.tabcolor="red" # Button color for Active State
        self.bgcolor="blue"    # Button color for Non-Active State
        self.bgcolor2 = 'yellow' # Background color of Dialogue
        self.textcolor="Green" # Text color for Dialogue

    # Creating Dialogue for messagebox
        self.root = Toplevel()
    
    # Removing titlebar from the Dialogue
        self.root.overrideredirect(True)

    # Setting Geometry
        self.root.geometry("300x120+100+100")
    
    # Setting Background color of Dialogue
        self.root.config(bg=self.bgcolor2)

    # Creating Label For message
        self.msg = Label(self.root,text=msg,
                        font=("Helvetica",9),
                        bg=self.bgcolor2,
                        fg=self.textcolor,
                        #anchor="nw"
                        )
        self.msg.place(x=10,y=28,height=60,width=280)

    # Creating TitleBar
        self.titlebar = Label(self.root,text=self.title,
                             bg=self.bgcolor2,
                             fg=self.textcolor,
                             bd=0,
                             font=("Helvetica",10,'bold')
                             )
        self.titlebar.place(x=100,y=5)
    
        # Creating Close Button
        self.CloseBtn = Button(self.root,
                                text="x",
                                font=("Helvetica",12),
                                command = lambda : self.closed(),
                                bd=0,
                                activebackground='red',
                                activeforeground='white',
                                background=self.bgcolor2,
                                foreground=self.textcolor)
        self.CloseBtn.place(x=260,y=0,width=40)
 
        # Changing Close Button Color on Mouseover
        self.CloseBtn.bind("<Enter>", lambda e,: self.CloseBtn.config(bg='red',fg='white'))
        self.CloseBtn.bind("<Leave>", lambda e,: self.CloseBtn.config(bg=self.bgcolor2,fg=self.textcolor))

    # Creating B1 
        self.B1 = Button(self.root,text=self.b1,command=self.click1,
                        bd=0,
                        font=("Helvetica",10),
                        bg=self.bgcolor,
                        fg='white',
                        activebackground=self.tabcolor,
                        activeforeground=self.textcolor)
        self.B1.place(x=225,y=90,height=25,width=60)
    
    # Getting place_info of B1
        self.B1.info = self.B1.place_info()
    
    # Creating B2
        if not b2=="":
            self.B2 = Button(self.root,text=self.b2,command=self.click2,
                            bd=0,
                            font=("Helvetica",10),
                            bg=self.bgcolor,
                            fg='white',
                            activebackground=self.tabcolor,
                            activeforeground=self.textcolor)
            self.B2.place(x=int(self.B1.info['x'])-(70*1),
                          y=int(self.B1.info['y']),
                          height=int(self.B1.info['height']),
                          width=int(self.B1.info['width'])
                          )
    # Creating B3
        if not b3=='':
            self.B3 = Button(self.root,text=self.b3,command=self.click3,
                            bd=0,
                            font=("Helvetica",10),
                            bg=self.bgcolor,
                            fg='white',
                            activebackground=self.tabcolor,
                            activeforeground=self.textcolor)
            self.B3.place(x=int(self.B1.info['x'])-(70*2),
                          y=int(self.B1.info['y']),
                          height=int(self.B1.info['height']),
                          width=int(self.B1.info['width'])
                          )
    # Creating B4
        if not b4=='':
            self.B4 = Button(self.root,text=self.b4,command=self.click4,
                            bd=0,
                            font=("Helvetica",10),
                            bg=self.bgcolor,
                            fg='white',
                            activebackground=self.tabcolor,
                            activeforeground=self.textcolor)
            self.B4.place(x=int(self.B1.info['x'])-(70*3),
                          y=int(self.B1.info['y']),
                          height=int(self.B1.info['height']),
                          width=int(self.B1.info['width'])
                          )

    # Making MessageBox Visible
        self.root.mainloop()

    # Function on Closeing MessageBox
    def closed(self):
        self.root.destroy() # Destroying Dialogue
        self.choice="closed"#Assigning Value
        
    # Function on pressing B1
    def click1(self):
        self.root.destroy() # Destroying Dialogue
        self.choice="1"     # Assigning Value

    # Function on pressing B2
    def click2(self):
        self.root.destroy() # Destroying Dialogue
        self.choice="2"     # Assigning Value

    # Function on pressing B3
    def click3(self):
        self.root.destroy() #Destroying Dialogue
        self.choice="3"     # Assigning Value

    # Function on pressing B4
    def click4(self):
        self.root.destroy() #Destroying Dialogue
        self.choice="4"     #Assigning Value

root = Tk()

def func():
    a = MessageBox(msg='Hello I m your multiline message',
                    title="Hello World",
                    b1='Button 1',
                    b2='Button 2',
                    )
    print(a.choice)

Button(root,text="Click Me",command=lambda : func()).pack()

root.mainloop()

You should not be calling mainloop inside the class. As a general rule of thumb you should only ever call mainloop() once the the life of the program. You already call it in the main logic after creating the root window so you shouldn’t call it again.

Instead, you can use wait_window to wait until the window is destroyed before returning:

# Making MessageBox Visible
self.root.wait_window()