from tkinter import *
root =Tk()
root.title("Valor Absoluto")
root.geometry("300x300")
root.resizable(0,0)
root.configure(bg="#d9ead3")
def app():
    v = valor.get()
    n = abs(v)
    resultado.set(n)
def limpar():
    valor_entrada.delete(0, END)
titulo = Label(text="Valor Absoluto", font=("Arial", "20", "bold"),
               bg="#d9ead3",fg="#bf9000")
titulo.place(relx=0.2, rely=0.05)
texto_sub1= Label(text="Digite o valor: ",
                  font=("Arial", "15", "bold"),bg="#d9ead3",fg="#bf9000")
texto_sub1.place(relx=0.05, rely=0.3)
valor = DoubleVar()
valor_entrada = Entry(textvariable=valor,
                             font=("Arial", "12", "bold"),
                             bg="white", fg="blue", justify='center')
valor_entrada.place(relx=0.55, rely=0.33, relwidth=0.35)
#
but1 = Button(text="Calculadora", bd=2, bg='#107db2', fg='white',
              font=('verdana', 10, 'bold'), command=app)
but1.place(relx=0.05, rely=0.5, relwidth=0.3, relheight=0.1)
but_limpar = Button(text="Limpar", bd=2, bg='#107db2', fg='white',
                    font=('verdana', 10, 'bold'), command=limpar)
but_limpar.place(relx=0.4, rely=0.5, relwidth=0.2, relheight=0.1)
but_sair = Button(text="Sair", bd=2, bg='#107db2', fg='white',
                    font=('verdana', 10, 'bold'), command=root.destroy)
but_sair.place(relx=0.65, rely=0.5, relwidth=0.2, relheight=0.1)

resultado_texto = Label(text="Valor Absoluto",
                           font=("Arial", 11, "bold"), bg="#d9ead3")
resultado_texto.place(relx=0.05, rely=0.7, relwidth=0.35,relheight=0.1)

resultado = StringVar()
resultado_entrada = Label(textvariable=resultado,
                           font=("Arial", 12, "bold"), bg="#cfe2f3")
resultado_entrada.place(relx=0.5, rely=0.7, relwidth=0.3,relheight=0.1)
root.mainloop()