if __name__ == "__main__":
    # Inicializar programa
    command = ''

    # Mostrar menu
    print_menu()

    # Loop principal
    while command != 'sair':
        #try:
            command = raw_input('> ').strip()
            if command.startswith("abrir"):
                carregar_PPM(command.split(" ")[1])
            elif command.startswith("guardar"):
                guardar_PPM(command.split(" ")[1])
            elif command.startswith("ver"):
                criar_imagem()
            else:
                if command.strip() != "sair": print 'Comando nao reconhecido!'
        #except:
            #print "erro