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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")
def clear_field():
global calculation
calculation = ""
text_result.delete(1.0, "end")
root = tk.Tk()
root.geometry("900x900")
text_result = tk.Text(root,height=2, width=16, font=("Lucida",40))
text_result.grid(columnspan=5)
btn1 = tk.Button(root, text="1", command=lambda:add_to_calculation(1),width=5,font=("Lucida",14))
btn1.grid(row=2, column=1)
btn2 = tk.Button(root, text="2", command=lambda:add_to_calculation(2),width=5,font=("Lucida",14))
btn2.grid(row=2, column=2)
btn3 = tk.Button(root, text="3", command=lambda:add_to_calculation(3),width=5,font=("Lucida",14))
btn3.grid(row=2, column=3)
btn4 = tk.Button(root, text="4", command=lambda:add_to_calculation(4),width=5,font=("Lucida",14))
btn4.grid(row=3, column=1)
btn5 = tk.Button(root, text="5", command=lambda:add_to_calculation(5),width=5,font=("Lucida",14))
btn5.grid(row=3, column=2)
btn6 = tk.Button(root, text="6", command=lambda:add_to_calculation(6),width=5,font=("Lucida",14))
btn6.grid(row=3, column=3)
btn7 = tk.Button(root, text="7", command=lambda:add_to_calculation(7),width=5,font=("Lucida",14))
btn7.grid(row=4, column=1)
btn8 = tk.Button(root, text="8", command=lambda:add_to_calculation(8),width=5,font=("Lucida",14))
btn8.grid(row=4, column=2)
btn9 = tk.Button(root, text="9", command=lambda:add_to_calculation(9),width=5,font=("Lucida",14))
btn9.grid(row=4, column=3)
btn0 = tk.Button(root, text="0", command=lambda:add_to_calculation(0),width=5,font=("Lucida",14))
btn0.grid(row=5, column=2)
btn_plus = tk.Button(root, text="+", command=lambda:add_to_calculation("+"),width=5,font=("Lucida",14))
btn_plus.grid(row=2, column=4)
btn_minus = tk.Button(root, text="-", command=lambda:add_to_calculation("-"),width=5,font=("Lucida",14))
btn_minus.grid(row=3, column=4)
btn_multiply = tk.Button(root, text="*", command=lambda:add_to_calculation("*"),width=5,font=("Lucida",14))
btn_multiply.grid(row=4, column=4)
btn_divide = tk.Button(root, text="/", command=lambda:add_to_calculation("/"),width=5,font=("Lucida",14))
btn_divide.grid(row=5, column=4)
btn_open = tk.Button(root, text="(", command=lambda:add_to_calculation("("),width=5,font=("Lucida",14))
btn_open.grid(row=5, column=1)
btn_close = tk.Button(root, text=")", command=lambda:add_to_calculation(")"),width=5,font=("Lucida",14))
btn_close.grid(row=5, column=3)
btn_clear = tk.Button(root, text="C", command=clear_field,width=15,font=("Lucida",14))
btn_clear.grid(row=6, column=1,columnspan=2)
btn_equals = tk.Button(root, text="=", command=evaluate_calculation,width=15,font=("Lucida",14))
btn_equals.grid(row=6, column=3,columnspan=2)
root.mainloop()