Factor de Taxa de Juro

from tkinter import *
root = Tk()
root.geometry("300x300")
root.resizable(0, 0)
root.config(bg="#d9ead3")
root.title("Factor de Taxa de Juro")
def app():
    juro = tx_juro.get()
    juropp = juro/100
    n=periodo.get()
    d = 1+juropp
    p = 1*pow(d,n)
    factor = round((1/p),3)

    resultado.set(factor)
def limpar():
    tx_juro_entrada.delete(0, END)
    periodo_entrada.delete(0, END)
titulo = Label(text="Factor de Taxa de Juro ",
                          bg="#d9ead3", fg="#0b5394",
                      font=("Arial", "15", "bold"))
titulo.place(relx=0.15, rely=0.05)

taxa_juro_texto = Label(text="Taxa de Juro (em %) ",
                          bg="#d9ead3", fg="#0b5394",
                      font=("Arial", "12", "bold"))
taxa_juro_texto.place(relx=0.05, rely=0.25)

numero_texto = Label(text="Período ",
                          bg="#d9ead3", fg="#0b5394",
                      font=("Arial", "12", "bold"))
numero_texto.place(relx=0.35, rely=0.4)

tx_juro = DoubleVar()
tx_juro_entrada = Entry(textvariable=tx_juro,
                                  font=("Arial", "12", "bold"),
                                  bg="white", fg="blue", justify='center')
tx_juro_entrada.place(relx=0.63, rely=0.25, relwidth=0.35)

periodo = IntVar()
periodo_entrada = Entry(textvariable=periodo,
                                  font=("Arial", "12", "bold"),
                                  bg="white", fg="blue", justify='center')
periodo_entrada.place(relx=0.63, rely=0.4, relwidth=0.35)

#
but1 = Button(text="Calcular", bd=2, bg='#107db2', fg='white',
              font=('verdana', 12, 'bold'),command=app)
but1.place(relx=0.15, rely=0.6, relwidth=0.35, relheight=0.1)

but_limpar = Button(text="Limpar", bd=2, bg='#107db2', fg='white',
                    font=('verdana', 12, 'bold'), command=limpar)
but_limpar.place(relx=0.55, rely=0.6, relwidth=0.35, relheight=0.1)
resultado = StringVar()
resulatdo_final = Label(textvariable=resultado,
                           font=("Arial", 12, "bold"), bg="#f0f8ff")
resulatdo_final.place(relx=0.65, rely=0.8, relwidth=0.3)

resulatdo_texto= Label(text="Factor de taxa de juro",
                           font=("Arial", 12, "bold"), bg="#f0f8ff")
resulatdo_texto.place(relx=0.05, rely=0.8)

root.mainloop()
Mundo em Python

Factor de Taxa de Juro
