from tkinter import *

root = Tk()
root.geometry("400x400")
root.resizable(0, 0)
root.config(bg="#103030")
root.title("Formatar o número de milhares ou milhões")

titulo = Label(text="Formatar o número",
               font=("Arial", 28, "bold"), bg="#103030", fg="#49e3e3")
titulo.place(relx=0.08, rely=0.05)

texto_sub1 = Label(text="Número :",
                   font=("Arial", 18, "bold"), bg="#103030", fg="#49e3e3")
texto_sub1.place(relx=0.05, rely=0.25)

texto_sub2 = Label(text="Casas decimais:",
                   font=("Arial", 18, "bold"), bg="#103030", fg="#49e3e3")
texto_sub2.place(relx=0.05, rely=0.38)

Número = StringVar()
Número_entrada = Entry(textvariable=Número,
                      font=("Arial", 12, "bold"),
                      bg="white", fg="blue", justify='center')
Número_entrada.place(relx=0.35, rely=0.26, relwidth=0.6)

decimal = StringVar()
decimal_entrada = Entry(textvariable=decimal,
                      font=("Arial", 12, "bold"),
                      bg="white", fg="blue", justify='center')
decimal_entrada.place(relx=0.55, rely=0.39, relwidth=0.4)

def limpar():
    Número_entrada.delete(0, END)
    decimal_entrada.delete(0, END)
    resultado_texto.config(text="")

def app():
    try:
        n = float(Número.get())
        d = int(decimal.get())
        mensagem = f"{n:,.{d}f}"
        resultado_texto.config(text=mensagem.replace(",", "X").replace(".", ",").replace("X", "."))
    except ValueError:
        resultado_texto.config(text="Erro de digitação")

but1 = Button(text="Mostrar", bd=2, bg='#107db2', fg='white',
              font=('verdana', 12, 'bold'), command=app)
but1.place(relx=0.1, rely=0.6, relwidth=0.25, relheight=0.1)

but_limpar = Button(text="Limpar", bd=2, bg='#107db2', fg='white',
                    font=('verdana', 12, 'bold'), command=limpar)
but_limpar.place(relx=0.4, rely=0.6, relwidth=0.25, relheight=0.1)

but_sair = Button(text="Sair", bd=2, bg='#107db2', fg='white',
                  font=('verdana', 12, 'bold'), command=root.destroy)
but_sair.place(relx=0.7, rely=0.6, relwidth=0.25, relheight=0.1)

resultado_texto = Label(text="",
                        font=("Arial", 12, "bold"), bg="#cfe2f3")
resultado_texto.place(relx=0.05, rely=0.8, relwidth=0.9, relheight=0.15)

root.mainloop()