The ironic frustration with While and Pause on Python

Question

Just discovered this forum and it's unbelievable how helpful its community is. Well, I have an issue trying to make a "while" loop on Python. I want the program's menu to repeat until you select Option 6 - Salir (Exit). Everything is fine at first, but after I select an option and the program prints x thing, I press enter to return to the menu or continue (just like when you use a pause on C) and get an error.

Juan es un empleado mexicano comun con poco salario minimo. Que quiere saber de el?  MENU 
1.Salario 
2.Sombrero 
3.Playera 
4.Pantalones 
5.Tenis 
6.Salir

Seleccione una opcion 1 El salario de Juan es  7.5

MENU 
1.Salario 
2.Sombrero 
3.Playera 
4.Pantalones 
5.Tenis 
6.Salir

Seleccione una opcion Traceback (most recent call last):   File "C:\Users\joguzman\Documents\Proyectos Eclipse\Clases\src\main.py", line 22, in <module>
    opcion=int(input("\nSeleccione una opcion\n")) ValueError: invalid literal for int() with base 10: ''

I also want it to clear the screen, which doesn't happen at all. Here's my code:

import os class empleadoClass: #las propiedades que tendra cada empleado
    salario=7.5
    sombrero='nike'
    playera='polo'
    pantalones='patito'
    tenis='adidas'
     juanObject = empleadoClass() #'juanObjeto' esta "heredando" propiedades de empleadoClass

print ("Juan es un empleado mexicano comun con poco salario minimo. Que quiere saber de el?") opcion=1


while (opcion!=6):
    print("MENU \n1.Salario \n2.Sombrero \n3.Playera \n4.Pantalones \n5.Tenis \n6.Salir")
    opcion=int(input("\nSeleccione una opcion\n"))



    if (opcion==1):
        print ("El salario de Juan es ",juanObject.salario)
        os.system('pause>nul')
        os.system('cls')

    elif (opcion==2):
        print ("La marca del sombrero de Juan es ",juanObject.sombrero)
        os.system('pause>nul')
        os.system('cls')

    elif (opcion==3):
        print ("La marca de la playera de Juan es ",juanObject.playera)
        os.system('pause>nul')
        os.system('cls')

    elif (opcion==4):
        print ("La marca de los pantalones de Juan es ",juanObject.pantalones)
        os.system('pause>nul')
        os.system('cls')

    elif (opcion==5):
        print ("La marca de los tenis de Juan es ",juanObject.tenis)
        os.system('pause>nul')
        os.system('cls')

    elif(opcion==6):
        print ("Gracias por usar nuestro programa!")

    else:
        print ("Ingrese una opcion correcta")
        os.system('pause>nul')
        os.system('cls')

Thanks in advance! :D And sorry for any grammar mistakes, as you can see I'm not a native english speaker.

EDIT: It seems the code's structure got a messy when posting... Does anyone know how to solve this? :/

Answer 1

I think a simpler way to do a menu like this is to:

def print_menu():
    # print stuff here, 6 exits

while True:
    print_menu()
    try:
        choice = int(input('>>'))
        if choice == 1:
            blah
        elif choice == 2:
            more blah
        elif choice == 6:
            break
    except ValueError:
        handle_error()

As for clearing the screen that depends on what OS you are using and how you are running the program. See this question - how to clear the screen in python