Say I have a list of dictionaries:

universe_creatures = [
    {'type': 'dragon', 'weight': 1400},
    {'type': 'kraken', 'weight': 6000},
    {'type': 'elf', 'weight': 75},
    ...]

How can I search if there’s a certain type in one of the dictionary values in a shortly phrased code, but as efficient as possible?

What I currently have:

typ = 'dragon'
found = False

I believe for-loop is the most efficient because it iterates over once, and doesn’t have overheads as generator calls do.

# for loop

for c in universe_creatures:
    if typ == c['type']:
        found = True

But I’m looking for a shorter phrase, like the two below, and want to learn if the generator expression is too expensive compared to the for-loop above, since I think it is more efficient than list comprehension as the latter iterates over data more than once.

# generator expression

found = typ in (c['type'] for c in universe_creatures)

# list comprehension

found = typ in [c['type'] for c in universe_creatures]