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from tkinter import *
 
 
def clear():
    entry1.delete(0,END)
 
 
def cb(msg):
    entry1.insert(0,msg)
 
 
build = ['1','2','3','+']
 
#функция рассчета
def calculator():
    res = entry1.get()
    entry1.delete(0,END)
    entry1.insert(0, eval(res))
 
def insert():
 
    entry1.insert(0,str(res))
 
 
#окно
window = Tk()
window.title('calculator')
window.geometry('300x400')
window.configure(background='gray55')
#кнопка =
btn_equally = Button(window, text = '=', command=calculator, background='yellow',font='Arial 18',activebackground='yellow')
btn_equally.pack()
#кнопка очистить
btn_clear = Button(window, command=clear, bg='red', text='clear',font='Arial 18',activebackground='red')
btn_clear.pack()
#поле ввода примера
entry1 = Entry(window,width=11,font='Arial 24')
entry1.pack()
#кнопки
for b in build:
    buttons = Button(window, text=build, command=lambda param=b: cb(param))
    buttons.pack()
window.mainloop()

Main.java:1: error: class, interface, or enum expected
from tkinter import *
^
Main.java:1: error: <identifier> expected
from tkinter import *
                   ^
Main.java:1: error: ';' expected
from tkinter import *
                     ^
Main.java:14: error: illegal character: '#'
#??????? ????????
^
Main.java:25: error: illegal character: '#'
#????
^
Main.java:27: error: unclosed character literal
window.title('calculator')
             ^
Main.java:27: error: unclosed character literal
window.title('calculator')
                        ^
Main.java:28: error: unclosed character literal
window.geometry('300x400')
                ^
Main.java:28: error: unclosed character literal
window.geometry('300x400')
                        ^
Main.java:29: error: unclosed character literal
window.configure(background='gray55')
                            ^
Main.java:29: error: unclosed character literal
window.configure(background='gray55')
                                   ^
Main.java:30: error: illegal character: '#'
#?????? =
^
Main.java:31: error: unclosed character literal
btn_equally = Button(window, text = '=', command=calculator, background='yellow',font='Arial 18',activebackground='yellow')
                                                                        ^
Main.java:31: error: unclosed character literal
btn_equally = Button(window, text = '=', command=calculator, background='yellow',font='Arial 18',activebackground='yellow')
                                                                               ^
Main.java:31: error: unclosed character literal
btn_equally = Button(window, text = '=', command=calculator, background='yellow',font='Arial 18',activebackground='yellow')
                                                                                      ^
Main.java:31: error: unclosed character literal
btn_equally = Button(window, text = '=', command=calculator, background='yellow',font='Arial 18',activebackground='yellow')
                                                                                               ^
Main.java:31: error: unclosed character literal
btn_equally = Button(window, text = '=', command=calculator, background='yellow',font='Arial 18',activebackground='yellow')
                                                                                                                  ^
Main.java:31: error: unclosed character literal
btn_equally = Button(window, text = '=', command=calculator, background='yellow',font='Arial 18',activebackground='yellow')
                                                                                                                         ^
Main.java:33: error: illegal character: '#'
#?????? ????????
^
Main.java:34: error: unclosed character literal
btn_clear = Button(window, command=clear, bg='red', text='clear',font='Arial 18',activebackground='red')
                                             ^
Main.java:34: error: unclosed character literal
btn_clear = Button(window, command=clear, bg='red', text='clear',font='Arial 18',activebackground='red')
                                                 ^
Main.java:34: error: unclosed character literal
btn_clear = Button(window, command=clear, bg='red', text='clear',font='Arial 18',activebackground='red')
                                                         ^
Main.java:34: error: unclosed character literal
btn_clear = Button(window, command=clear, bg='red', text='clear',font='Arial 18',activebackground='red')
                                                               ^
Main.java:34: error: unclosed character literal
btn_clear = Button(window, command=clear, bg='red', text='clear',font='Arial 18',activebackground='red')
                                                                      ^
Main.java:34: error: unclosed character literal
btn_clear = Button(window, command=clear, bg='red', text='clear',font='Arial 18',activebackground='red')
                                                                               ^
Main.java:34: error: unclosed character literal
btn_clear = Button(window, command=clear, bg='red', text='clear',font='Arial 18',activebackground='red')
                                                                                                  ^
Main.java:34: error: unclosed character literal
btn_clear = Button(window, command=clear, bg='red', text='clear',font='Arial 18',activebackground='red')
                                                                                                      ^
Main.java:36: error: illegal character: '#'
#???? ????? ???????
^
Main.java:37: error: unclosed character literal
entry1 = Entry(window,width=11,font='Arial 24')
                                    ^
Main.java:37: error: unclosed character literal
entry1 = Entry(window,width=11,font='Arial 24')
                                             ^
Main.java:39: error: illegal character: '#'
#??????
^
31 errors

Standard output is empty