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calculator.py
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calculator.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_field()
text_result.insert(1.0, "Error")
pass
def clear_field():
global calculation
calculation = ""
text_result.delete(1.0, "end")
root = tk.Tk()
root.geometry("300x275")
root.title("Calculator")
text_result = tk.Text(root, height=2, width=16, font=("Arial", 24))
text_result.grid(columnspan=5)
btn_1 = tk.Button(root, text = "1", command = lambda: add_to_calculation(1), width=5, font=("Arial", 14))
btn_1.grid(row=2, column=1)
btn_2 = tk.Button(root, text = "2", command = lambda: add_to_calculation(2), width=5, font=("Arial", 14))
btn_2.grid(row=2, column=2)
btn_3 = tk.Button(root, text = "3", command = lambda: add_to_calculation(3), width=5, font=("Arial", 14))
btn_3.grid(row=2, column=3)
btn_4 = tk.Button(root, text = "4", command = lambda: add_to_calculation(4), width=5, font=("Arial", 14))
btn_4.grid(row=3, column=1)
btn_5 = tk.Button(root, text = "5", command = lambda: add_to_calculation(5), width=5, font=("Arial", 14))
btn_5.grid(row=3, column=2)
btn_6 = tk.Button(root, text = "6", command = lambda: add_to_calculation(6), width=5, font=("Arial", 14))
btn_6.grid(row=3, column=3)
btn_7 = tk.Button(root, text = "7", command = lambda: add_to_calculation(7), width=5, font=("Arial", 14))
btn_7.grid(row=4, column=1)
btn_8 = tk.Button(root, text = "8", command = lambda: add_to_calculation(8), width=5, font=("Arial", 14))
btn_8.grid(row=4, column=2)
btn_9 = tk.Button(root, text = "9", command = lambda: add_to_calculation(9), width=5, font=("Arial", 14))
btn_9.grid(row=4, column=3)
btn_0 = tk.Button(root, text = "0", command = lambda: add_to_calculation(0), width=5, font=("Arial", 14))
btn_0.grid(row=5, column=2)
btn_plus = tk.Button(root, text = "+", command = lambda: add_to_calculation("+"), width=5, font=("Arial", 14))
btn_plus.grid(row=2, column=4)
btn_minus = tk.Button(root, text = "-", command = lambda: add_to_calculation("-"), width=5, font=("Arial", 14))
btn_minus.grid(row=3, column=4)
btn_mul = tk.Button(root, text = "*", command = lambda: add_to_calculation("*"), width=5, font=("Arial", 14))
btn_mul.grid(row=4, column=4)
btn_div = tk.Button(root, text = "/", command = lambda: add_to_calculation("/"), width=5, font=("Arial", 14))
btn_div.grid(row=5, column=4)
btn_open = tk.Button(root, text = "(", command = lambda: add_to_calculation("("), width=5, font=("Arial", 14))
btn_open.grid(row=5, column=1)
btn_close = tk.Button(root, text = ")", command = lambda: add_to_calculation(")"), width=5, font=("Arial", 14))
btn_close.grid(row=5, column=3)
btn_equal = tk.Button(root, text = "=", command = evaluate_calculation, width=11, font=("Arial", 14))
btn_equal.grid(row=6, column=3, columnspan=2)
btn_clear = tk.Button(root, text = "C", command = clear_field, width=11, font=("Arial", 14))
btn_clear.grid(row=6, column=1, columnspan=2)
root.mainloop()