Beginner problem, replace function with for loop

[sd_0912]

A more concise style for writing the loop below:

list_of_aliens = [
    {'name': 'name_1', 'color': 'red', 'points': 5},
    {'name': 'name_2', 'color': 'blue', 'points': 10},
    {'name': 'name_3', 'color': 'blue', 'points': 10},
    {'name': 'name_4', 'color': 'green', 'points': 20},
    {'name': 'name_5', 'color': 'red', 'points': 5},
    {'name': 'name_6', 'color': 'green', 'points': 20},
    {'name': 'name_7', 'color': 'blue', 'points': 10},
    {'name': 'name_8', 'color': 'red', 'points': 5},
    {'name': 'name_9', 'color': 'blue', 'points': 10},
]

sum([alien['points'] for alien in list_of_aliens])

Basically, we initialize a list of dictionary objects for each alien, with the points baked into each alien entry. The for loop iterates over the list of dictionaries and returns a list with the points for each alien ... .we pass in this list to the sum() function to sum up the total points.

If you want to get the points for just the red aliens, you would do this:

sum([alien['points'] for alien in list_of_aliens if alien['color']== 'red'])