calculator_app_sample.py

import tkinter as tk

# Function to handle button clicks
def button_click(number):
    current = entry.get()
    entry.delete(0, tk.END)
    entry.insert(tk.END, current + str(number))

# Function to handle the equal button click
def button_equal():
    try:
        result = eval(entry.get())
        entry.delete(0, tk.END)
        entry.insert(tk.END, str(result))
    except Exception:
        entry.delete(0, tk.END)
        entry.insert(tk.END, "Error")

# Function to clear the entry field
def button_clear():
    entry.delete(0, tk.END)

# Create the main window
window = tk.Tk()
window.title("Calculator")

# 
window.bind('<Return>',button_equal)

w = 800
h = 600

# Get the screen dimensions
sw = window.winfo_screenwidth()
sh = window.winfo_screenheight()

# Find the center of the point
cx = int(sw/2 - h/2)
cy = int(sh/2 - w/2)

window.geometry(f'{w}x{h}+{cx}+{cy}')
# window.resizable(False, False)

# Create the entry field
entry = tk.Entry(window, width=50, borderwidth=2)
entry.grid(row=0, column=0, columnspan=4, padx=10, pady=10)

# Create number buttons
button_1 = tk.Button(window, text="1", padx=20, pady=10, command=lambda: button_click(1))
button_2 = tk.Button(window, text="2", padx=20, pady=10, command=lambda: button_click(2))
button_3 = tk.Button(window, text="3", padx=20, pady=10, command=lambda: button_click(3))
button_4 = tk.Button(window, text="4", padx=20, pady=10, command=lambda: button_click(4))
button_5 = tk.Button(window, text="5", padx=20, pady=10, command=lambda: button_click(5))
button_6 = tk.Button(window, text="6", padx=20, pady=10, command=lambda: button_click(6))
button_7 = tk.Button(window, text="7", padx=20, pady=10, command=lambda: button_click(7))
button_8 = tk.Button(window, text="8", padx=20, pady=10, command=lambda: button_click(8))
button_9 = tk.Button(window, text="9", padx=20, pady=10, command=lambda: button_click(9))
button_0 = tk.Button(window, text="0", padx=20, pady=10, command=lambda: button_click(0))

# Create operator buttons
button_add = tk.Button(window, text="+", padx=20, pady=10, command=lambda: button_click("+"))
button_subtract = tk.Button(window, text="-", padx=20, pady=10, command=lambda: button_click("-"))
button_multiply = tk.Button(window, text="*", padx=20, pady=10, command=lambda: button_click("*"))
button_divide = tk.Button(window, text="/", padx=20, pady=10, command=lambda: button_click("/"))

# Create other buttons
button_equal = tk.Button(window, text="=", padx=20, pady=10, command=button_equal)
button_clear = tk.Button(window, text="Clear", padx=20, pady=10, command=button_clear)
# button_equal.pack()

# Grid layout for buttons
button_1.grid(row=1, column=0)
button_2.grid(row=1, column=1)
button_3.grid(row=1, column=2)
button_4.grid(row=2, column=0)
button_5.grid(row=2, column=1)
button_6.grid(row=2, column=2)
button_7.grid(row=3, column=0)
button_8.grid(row=3, column=1)
button_9.grid(row=3, column=2)
button_0.grid(row=4, column=0)

button_add.grid(row=1, column=3)
button_subtract.grid(row=2, column=3)
button_multiply.grid(row=3, column=3)
button_divide.grid(row=4, column=3)

button_equal.grid(row=4, column=2)
button_clear.grid(row=4, column=1)

# Run the main loop
window.mainloop()