CALCULATOR

from tkinter import*

def btnClick(numbers):
    global operator
    operator=operator + str(numbers)
    text_input.set(numbers)

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("calculater")
operator=""
text_input=StringVar()

textDisplay = 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)
#===================================================================================================================
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=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)

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=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)
#==============================================================================================================
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=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)

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=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)

btnEqual=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