import tkinter as tk
calculation = ""
def add(symbol):
global calculation
calculation +=str(symbol)
text.delete(1.0,"end")
text.insert(1.0, calculation)
def evaluate():
global calculation
try:
calculation = str(eval(calculation))
text.delete(1.0,"end")
text.insert(1.0, calculation)
except:
clear()
text.insert(1.0,"Error")
def clear():
global calculation
calculation = ""
text.delete(1.0, "end")
pass
root = tk.Tk()
root.geometry("300x275")
text = tk.Text(root, height=2, width=16, font=("Arial", 24))
text.grid(columnspan=5)
btn1 = tk.Button(root, text="1", command=lambda: add(1), width=5, font=("Arial", 14))
btn1.grid(row=2, column=1)
btn2 = tk.Button(root, text="2", command=lambda: add(2), width=5, font=("Arial", 14))
btn2.grid(row=2, column=2)
btn3 = tk.Button(root, text="3", command=lambda: add(3), width=5, font=("Arial", 14))
btn3.grid(row=2, column=3)
btn4 = tk.Button(root, text="4", command=lambda: add(4), width=5, font=("Arial", 14))
btn4.grid(row=3, column=1)
btn5 = tk.Button(root, text="5", command=lambda: add(5), width=5, font=("Arial", 14))
btn5.grid(row=3, column=2)
btn6 = tk.Button(root, text="6", command=lambda: add(6), width=5, font=("Arial", 14))
btn6.grid(row=3, column=3)
btn7 = tk.Button(root, text="7", command=lambda: add(7), width=5, font=("Arial", 14))
btn7.grid(row=4, column=1)
btn8 = tk.Button(root, text="8", command=lambda: add(8), width=5, font=("Arial", 14))
btn8.grid(row=4, column=2)
btn9 = tk.Button(root, text="9", command=lambda: add(9), width=5, font=("Arial", 14))
btn9.grid(row=4, column=3)
btn0 = tk.Button(root, text="0", command=lambda: add(0), width=5, font=("Arial", 14))
btn0.grid(row=5, column=2)
btn_plus = tk.Button(root, text="+", command=lambda: add("+"), width=5, font=("Arial", 14))
btn_plus.grid(row=2, column=4)
btn_subtract = tk.Button(root, text="-", command=lambda: add("-"), width=5, font=("Arial", 14))
btn_subtract.grid(row=3, column=4)
btn_multiplication = tk.Button(root, text="*", command=lambda: add("*"), width=5, font=("Arial", 14))
btn_multiplication.grid(row=4, column=4)
btn_division = tk.Button(root, text="/", command=lambda: add("/"), width=5, font=("Arial", 14))
btn_division.grid(row=5, column=4)
btn_pl = tk.Button(root, text="(", command=lambda: add("("), width=5, font=("Arial", 14))
btn_pl.grid(row=5, column=1)
btn_pr = tk.Button(root, text=")", command=lambda: add(")"), width=5, font=("Arial", 14))
btn_pr.grid(row=5, column=3)
btn_equals = tk.Button(root, text="=", command=evaluate, width=11, font=("Arial", 14))
btn_equals.grid(row=6, column=3, columnspan=2)
btn_clr = tk.Button(root, text="C", command=clear, width=11, font=("Arial", 14))
btn_clr.grid(row=6, column=1, columnspan=2)
root.mainloop()