Generators

generators_heavy.py

import time

# Everyone in queue, and their desired order
def get_customers():
    return [('Bob', 'Ham Sandwich'), ('Paul', 'Grilled Cheese'), ('Sally', 'Chicken Croissant')]

customers = get_customers()


# make the sandwiches for all the customers, then deliver
def make_sandwiches():
    completed_sandwiches = []
    for customer in customers:
        time.sleep(1)  # making the sandwich for our custoemr
        completed_sandwiches.append((customer[0], customer[1]))
    return completed_sandwiches

sandwiches = make_sandwiches()

# deliver the sandwiches
for sandwich in sandwiches:
    print('Delivering sandwich:', sandwich[1], 'for', sandwich[0])