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main.py
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import tkinter as tk
calculation = ""
def add_to_calculation(symbol):
global calculation
calculation += str(symbol)
text_result.delete(1.0, "end")
text_result.insert(1.0, calculation)
def evaluate_calculation():
global calculation
try:
calculation = str(eval(calculation))
text_result.delete(1.0, "end")
text_result.insert(1.0, calculation)
except:
clear()
text_result.insert(1.0, "Error")
def clear():
global calculation
calculation = ""
text_result.delete(1.0, "end")
root = tk.Tk()
root.geometry("297x300")
text_result = tk.Text(root, height=2, width=16, font=("Arial", 20))
text_result.grid(columnspan =5)
btn_clear = tk.Button(root, text="C", command=clear, width=5, font=("Arial", 14))
btn_clear.grid(row=2, column=1)
btn_open = tk.Button(root, text="(", command=lambda: add_to_calculation("("), width=5, font=("Arial", 14))
btn_open.grid(row=2, column=2)
btn_close = tk.Button(root, text=")", command=lambda: add_to_calculation(")"), width=5, font=("Arial", 14))
btn_close.grid(row=2, column=3)
btn_division = tk.Button(root, text="/", command=lambda: add_to_calculation("/"), width=5, font=("Arial", 14))
btn_division.grid(row=2, column=4)
btn_times = tk.Button(root, text="x", command=lambda: add_to_calculation("*"), width=5, font=("Arial", 14))
btn_times.grid(row=3, column=4)
btn_subtraction = tk.Button(root, text="-", command=lambda: add_to_calculation("-"), width=5, font=("Arial", 14))
btn_subtraction.grid(row=4, column=4)
btn_addition = tk.Button(root, text="+", command=lambda: add_to_calculation("+"), width=5, font=("Arial", 14))
btn_addition.grid(row=5, column=4)
btn_equals = tk.Button(root, text="=", command= evaluate_calculation, width=5, font=("Arial", 14))
btn_equals.grid(row=6, column=4)
btn_decimal = tk.Button(root, text=".", command=lambda: add_to_calculation("."), width=5, font=("Arial", 14))
btn_decimal.grid(row=6, column=3)
btn_0 = tk.Button(root, text="0", command=lambda: add_to_calculation(0), width=11, font=("Arial", 14))
btn_0.grid(row=6, column=1, columnspan=2)
btn_1 = tk.Button(root, text="1", command=lambda: add_to_calculation(1), width=5, font=("Arial", 14))
btn_1.grid(row=5, column=1)
btn_2 = tk.Button(root, text="2", command=lambda: add_to_calculation(2), width=5, font=("Arial", 14))
btn_2.grid(row=5, column=2)
btn_3 = tk.Button(root, text="3", command=lambda: add_to_calculation(3), width=5, font=("Arial", 14))
btn_3.grid(row=5, column=3)
btn_4 = tk.Button(root, text="4", command=lambda: add_to_calculation(4), width=5, font=("Arial", 14))
btn_4.grid(row=4, column=1)
btn_5 = tk.Button(root, text="5", command=lambda: add_to_calculation(5), width=5, font=("Arial", 14))
btn_5.grid(row=4, column=2)
btn_6 = tk.Button(root, text="6", command=lambda: add_to_calculation(6), width=5, font=("Arial", 14))
btn_6.grid(row=4, column=3)
btn_7 = tk.Button(root, text="7", command=lambda: add_to_calculation(7), width=5, font=("Arial", 14))
btn_7.grid(row=3, column=1)
btn_8 = tk.Button(root, text="8", command=lambda: add_to_calculation(8), width=5, font=("Arial", 14))
btn_8.grid(row=3, column=2)
btn_9 = tk.Button(root, text="9", command=lambda: add_to_calculation(9), width=5, font=("Arial", 14))
btn_9.grid(row=3, column=3)
root.mainloop()