from tkinter import *
def btnClick(numbers):
global operator
operator = operator + str(numbers)
text_input.set(operator)
def btnClearDisplay():
global operator
operator =""
text_input.set("")
def btnEqualsInput():
global operator
sumup = str(eval(operator))
text_input.set(sumup)
operator=""
cal = Tk()
cal.title("Calculator")
operator = ""
text_input = StringVar()
txtDisplay = Entry(cal, font=('arial', 20, 'bold'), textvariable=text_input, bd=30,
insertwidth=4, bg='powder blue', justify='right').grid(columnspan=4)
btn7 = Button(cal, padx=16, pady=16, bd=8, fg='black', font=('arial', 20, 'bold'),
text='7', command=lambda:btnClick(7) ).grid(row=1, column=0)
btn8 = Button(cal, padx=16, pady=16, bd=8, fg='black', font=('arial', 20, 'bold'),
text='8', command=lambda:btnClick(8)).grid(row=1, column=1)
btn9 = Button(cal, padx=16, pady=16, bd=8, fg='black', font=('arial', 20, 'bold'),
text='9', command=lambda:btnClick(9)).grid(row=1, column=2)
addition = Button(cal, padx=16, pady=16, bd=8, fg='black', font=('arial', 20, 'bold'),
text='+', command=lambda:btnClick('+')).grid(row=1, column=3)
#============================================================================
btn4 = Button(cal, padx=16, pady=16, bd=8, fg='black', font=('arial', 20, 'bold'),
text='4', command=lambda:btnClick(4)).grid(row=2, column=0)
btn5 = Button(cal, padx=16, pady=16, bd=8, fg='black', font=('arial', 20, 'bold'),
text='5', command=lambda:btnClick(5)).grid(row=2, column=1)
btn6 = Button(cal, padx=16, pady=16, bd=8, fg='black', font=('arial', 20, 'bold'),
text='6', command=lambda:btnClick(6)).grid(row=2, column=2)
subtraction = Button(cal, padx=16, pady=16, bd=8, fg='black', font=('arial', 20, 'bold'),
text='-', command=lambda:btnClick('-')).grid(row=2, column=3)
#============================================================================
btn1 = Button(cal, padx=16, pady=16, bd=8, fg='black', font=('arial', 20, 'bold'),
text='1', command=lambda:btnClick(1)).grid(row=3, column=0)
btn2 = Button(cal, padx=16, pady=16, bd=8, fg='black', font=('arial', 20, 'bold'),
text='2', command=lambda:btnClick(2)).grid(row=3, column=1)
btn3 = Button(cal, padx=16, pady=16, bd=8, fg='black', font=('arial', 20, 'bold'),
text='3', command=lambda:btnClick(3)).grid(row=3, column=2)
multiply = Button(cal, padx=16, pady=16, bd=8, fg='black', font=('arial', 20, 'bold'),
text='*', command=lambda:btnClick('*')).grid(row=3, column=3)
#============================================================================
btn0 = Button(cal, padx=16, pady=16, bd=8, fg='black', font=('arial', 20, 'bold'),
text='0', command=lambda:btnClick(0)).grid(row=4, column=0)
btnClear = Button(cal, padx=16, pady=16, bd=8, fg='black', font=('arial', 20, 'bold'),
text='C', command= btnClearDisplay).grid(row=4, column=1)
btnEquals = Button(cal, padx=16, pady=16, bd=8, fg='black', font=('arial', 20, 'bold'),
text='=', command=btnEqualsInput).grid(row=4, column=2)
division = Button(cal, padx=16, pady=16, bd=8, fg='black', font=('arial', 20, 'bold'),
text='/', command=lambda:btnClick('/')).grid(row=4, column=3)
cal.mainloop()
def btnClick(numbers):
global operator
operator = operator + str(numbers)
text_input.set(operator)
def btnClearDisplay():
global operator
operator =""
text_input.set("")
def btnEqualsInput():
global operator
sumup = str(eval(operator))
text_input.set(sumup)
operator=""
cal = Tk()
cal.title("Calculator")
operator = ""
text_input = StringVar()
txtDisplay = Entry(cal, font=('arial', 20, 'bold'), textvariable=text_input, bd=30,
insertwidth=4, bg='powder blue', justify='right').grid(columnspan=4)
btn7 = Button(cal, padx=16, pady=16, bd=8, fg='black', font=('arial', 20, 'bold'),
text='7', command=lambda:btnClick(7) ).grid(row=1, column=0)
btn8 = Button(cal, padx=16, pady=16, bd=8, fg='black', font=('arial', 20, 'bold'),
text='8', command=lambda:btnClick(8)).grid(row=1, column=1)
btn9 = Button(cal, padx=16, pady=16, bd=8, fg='black', font=('arial', 20, 'bold'),
text='9', command=lambda:btnClick(9)).grid(row=1, column=2)
addition = Button(cal, padx=16, pady=16, bd=8, fg='black', font=('arial', 20, 'bold'),
text='+', command=lambda:btnClick('+')).grid(row=1, column=3)
#============================================================================
btn4 = Button(cal, padx=16, pady=16, bd=8, fg='black', font=('arial', 20, 'bold'),
text='4', command=lambda:btnClick(4)).grid(row=2, column=0)
btn5 = Button(cal, padx=16, pady=16, bd=8, fg='black', font=('arial', 20, 'bold'),
text='5', command=lambda:btnClick(5)).grid(row=2, column=1)
btn6 = Button(cal, padx=16, pady=16, bd=8, fg='black', font=('arial', 20, 'bold'),
text='6', command=lambda:btnClick(6)).grid(row=2, column=2)
subtraction = Button(cal, padx=16, pady=16, bd=8, fg='black', font=('arial', 20, 'bold'),
text='-', command=lambda:btnClick('-')).grid(row=2, column=3)
#============================================================================
btn1 = Button(cal, padx=16, pady=16, bd=8, fg='black', font=('arial', 20, 'bold'),
text='1', command=lambda:btnClick(1)).grid(row=3, column=0)
btn2 = Button(cal, padx=16, pady=16, bd=8, fg='black', font=('arial', 20, 'bold'),
text='2', command=lambda:btnClick(2)).grid(row=3, column=1)
btn3 = Button(cal, padx=16, pady=16, bd=8, fg='black', font=('arial', 20, 'bold'),
text='3', command=lambda:btnClick(3)).grid(row=3, column=2)
multiply = Button(cal, padx=16, pady=16, bd=8, fg='black', font=('arial', 20, 'bold'),
text='*', command=lambda:btnClick('*')).grid(row=3, column=3)
#============================================================================
btn0 = Button(cal, padx=16, pady=16, bd=8, fg='black', font=('arial', 20, 'bold'),
text='0', command=lambda:btnClick(0)).grid(row=4, column=0)
btnClear = Button(cal, padx=16, pady=16, bd=8, fg='black', font=('arial', 20, 'bold'),
text='C', command= btnClearDisplay).grid(row=4, column=1)
btnEquals = Button(cal, padx=16, pady=16, bd=8, fg='black', font=('arial', 20, 'bold'),
text='=', command=btnEqualsInput).grid(row=4, column=2)
division = Button(cal, padx=16, pady=16, bd=8, fg='black', font=('arial', 20, 'bold'),
text='/', command=lambda:btnClick('/')).grid(row=4, column=3)
cal.mainloop()
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