function for extracting data from lists

[Paulman]

Wow... OK now I understand!! Many thanks, I was becoming crazy complicating thing and looping my brain instead of coding, now it finally works as expected (below the correct code). Many thanks again, in particular with the details: they helped me to understand things more linearly.

def main(list_1):
    return main
  
list_1 = [
    {'name': 'Jerome', 'weight': 3.38, 'wingspan': 49.96, 'length': 19.75},
    {'name': 'Ibraheem', 'weight': 3.08, 'wingspan': 50.59, 'length': 20.6},
    {'name': 'Tiana', 'weight': 0.81, 'wingspan': 47.86, 'length': 17.94},
    {'name': 'Lucas', 'weight': 3.33, 'wingspan': 48.27, 'length': 18.77},
    {'name': 'Rickie', 'weight': 4.4, 'wingspan': 51.0, 'length': 20.34}
]
  
def get_data(data,key):
    y = []
    for x in data:
      y.append(x[key])
    return y
data = list_1
get_data(list_1,'length')
output = get_data(list_1, 'length')
print(output, end=" ")