import tkinter as tk

def tk_05():
    """[ 1 kilometre = 0.6214 miles] & [ 1 mile = 1.6093 kilometres]
       Using these figures, make a program that will allow the user to convert
       between miles and kilometres."""
    def conv_km_to_ml():
        kms = txt_in_box.get()
        if kms != "":
            mls = int(kms) * 0.6214
            txt_conv["text"] = round(mls, 3)
            #txt_in_box.delete(0, 'end')
            lbl_in["text"] = "Kilometros"
            lbl_out["text"] = "Millas"
        txt_in_box.focus()

    def conv_ml_to_km():
        mls = txt_in_box.get()
        if mls != "":
            mls = int(mls) * 1.6093
            txt_conv["text"] = round(mls, 3)
            lbl_in["text"] = "Millas"
            lbl_out["text"] = "Kilometros"
        txt_in_box.focus()

    def reset():
        txt_in_box.delete(0, 'end')
        lbl_in["text"] = ""
        lbl_out["text"] = ""
        txt_conv["text"] = ""
        txt_in_box.focus()

    window = tk.Tk()
    window.title("Conversor Distancias TK")
    window.geometry("320x230")

    lbl_in = tk.Label(text="")
    lbl_in["justify"] = "left"
    lbl_in.place(x=190, y=25, width=100, height=35)

    txt_in_box = tk.Entry()
    txt_in_box["justify"] = "center"
    txt_in_box.place(x=40, y=25, width=150, height=35)
    txt_in_box.focus()
    
    btn_conv1 = tk.Button(text="Convertir a millas", command=conv_km_to_ml)
    btn_conv1["fg"] = "black"
    btn_conv1["bg"] = "cyan"
    btn_conv1.place(x=40, y=120, width=150, height=35)
    
    btn_conv2 = tk.Button(text="Convertir a kilometros", command=conv_ml_to_km)
    btn_conv2["fg"] = "black"
    btn_conv2["bg"] = "cyan"
    btn_conv2.place(x=40, y=160, width=150, height=35)

    btn_clr = tk.Button(text="Limpiar", command=reset)
    btn_clr["fg"] = "black"
    btn_clr["bg"] = "cyan"
    btn_clr.place(x=200, y=120, width=80, height=75)

    lbl_out = tk.Label(text="")
    lbl_out["justify"] = "left"
    lbl_out.place(x=190, y=75, width=100, height=35)

    txt_conv = tk.Message(text=0)
    txt_conv["bg"] = "magenta"
    txt_conv["fg"] = "black"
    txt_conv["width"] = 100
    txt_conv.place(x=40, y=75, width=150, height=35)
    
    window.mainloop()