```from prefect import Flow, flatten
files = pre...
# ask-communitya
Andy Dyer
05/05/2023, 8:03 PM Copy code
from prefect import Flow, flatten
files = preprocess_csv.map(flatten(list_of_csvs))d
Dominic Tarro
05/06/2023, 3:32 AM Copy code
@task
def flatten(nested: list[list]) -> list:
return [el for arr in nested for el in arr]f
flapili
05/06/2023, 11:56 AMjust use sum
flapili
05/06/2023, 11:58 AM Copy code
nested = [list(range(5)) for x in range(5)]
nested
[[0, 1, 2, 3, 4], [0, 1, 2, 3, 4], [0, 1, 2, 3, 4], [0, 1, 2, 3, 4], [0, 1, 2, 3, 4]]
sum(nested, [])
[0, 1, 2, 3, 4, 0, 1, 2, 3, 4, 0, 1, 2, 3, 4, 0, 1, 2, 3, 4, 0, 1, 2, 3, 4]8 Views