Extracting a Single Field

flights = [
    {"name": "Mercury-Redstone 3", "altitude_km": 187.0, "duration_min": 15.0},
    {"name": "Vostok 1", "altitude_km": 327.0, "duration_min": 108.0},
    {"name": "Freedom 7", "altitude_km": 187.0, "duration_min": 15.0},
]

names = [f["name"] for f in flights]
altitudes = [f["altitude_km"] for f in flights]

print(names)
print(altitudes)

['Mercury-Redstone 3', 'Vostok 1', 'Freedom 7']
[187.0, 327.0, 187.0]