Question

my question is how can i implement it when i click the button â it will paste inside the Entry â as character or more of those buttons

I don’t need the code for it. What i need is the idea to do this.

Answer 1

This shows how to do it for two buttons, using a tkinter Entry widget:

from Tkinter import *

class Application(Frame):
    def __init__(self, master=None):
        Frame.__init__(self, master)

        self.text = Entry(self)
        self.text.pack({"side": "left"})

        self.but1 = Button(self)
        self.but1["text"] = "a"
        self.but1.bind("<Button-1>",  self.do)
        self.but1.pack({"side": "left"})

        self.but2 = Button(self)
        self.but2["text"] = "b"
        self.but2.bind("<Button-1>",  self.do)
        self.but2.pack({"side": "left"})

        self.pack()

    def do(self, event):
        widget = event.widget
        self.text.delete(0, END)
        self.text.insert(0, widget["text"])

root = Tk()
app = Application(master=root)
app.mainloop()

Edited: eliminated root.destroy() that is not needed. See also Bryan Oakley comments below for an alternative strategy using the command argument instead of the bind method