import tkinter as tk

def get_primes():

    try:

        n = int(entry.get())

        primes = []

        for num in range(2, n):

            for i in range(2, int(num ** 0.5) + 1):

                if num % i == 0:

                    break

            else:

                primes.append(num)

        result.config(text=primes)

    except ValueError:

        result.config(text="Please enter a valid number.")

root = tk.Tk()

root.title("Prime Numbers")

label = tk.Label(root, text="Enter a number:")

label.pack(pady=10)

entry = tk.Entry(root)

entry.pack()

button = tk.Button(root, text="Find primes", command=get_primes)

button.pack(pady=10)

result = tk.Label(root, text="")

result.pack()

root.mainloop()