How do I map instead of listing ?

You did everything correct except for 2 tiny things:

dicts = [
    {'name': 'Michelangelo',
     'food': 'PIZZA'},
    {'name': 'Garfield',
     'food': 'lasanga'},
    {'name': 'Walter',
     'food': 'pancakes'},
    {'name': 'Galactus',
     'food': 'worlds'}
]

string = "Hi, I'm {name} and I love to eat {food}!"

def string_factory(dict_list, string):
  for food in dicts:
    return string.format(**food)

you did:

print(string.format(**dicts))

unfortunately dicts is a list of dictionaries where as food is a dictionary in the list dicts, your for loop should do this:

for food in dicts:
    return string.format(**food)

ALSO you need to return not print. that should do the trick.

hope this helped

Sorry, I was wrong the first time I answered your question. A few thing that I want to clarify:

1. Since you are creating the variables "dict" and "string" outside the function "string_factory", these variables (dict and string) are available in the scope of your function hence you do not need to pass them as arguements
2. Your function should return a list

I solved the problem in pythons interactive shell. This is how your function should look:

def string_factory():
    x = []
    for food in dicts:
        x.append(string.format(**food))
    return x