printing_models.py

#!/usr/bin/python3

def print_models(unprinted_designs):
    """
    Simulate printing each design, until none are left.
    Move each design to completed_models after printing.
    """

    completed_models = []
    while unprinted_designs:
        current_design = unprinted_designs.pop()
        
        # Simulate creating a 3D print from the design.
        print("Printing model: " + current_design)
        completed_models.append(current_design)
    return completed_models

def show_completed_models(completed_models):
    """Show all the models that were printed."""
    print("\nThe following models have been printed:")
    for completed_model in completed_models:
        print(completed_model)

unprinted_designs = ['iphone case','robot pendant','dodecahedron']

completed_models = print_models(unprinted_designs)
show_completed_models(completed_models)