response to https://www.v2ex.com/t/725192

gistfile1.txt

def chunk(iterable_obj, n):
    assert n > 0, "n must be greater than zero"
    
    while iterable_obj:
        yield iterable_obj[:n]
        iterable_obj = iterable_obj[n:]

def generate_ft_struct(fs, ts):
    return [
        {
            f"f{i}": f,
            f"t{i}": t
        }
        for i, (f, t) in enumerate(zip(fs, ts), 1)

    ]

a = [1, 2, 3, 4]
b = ["a", "b", "c", "d"]

nums = 2

chunk_a = chunk(a, nums)
chunk_b = chunk(b, nums)

res = [generate_ft_struct(fs, ts) for fs, ts in zip(chunk_a, chunk_b)]