Generate `count` weights from a range, `seq` that add up to a given `target`

subsequences.py

def subsequences(count, seq = range(5, 40, 5), target = 100, partial = []):
    if count == 0:
        return
    
    s = sum(partial)
    
    if s >= target:
        return
    
    if s == target or (count == 1 and (target - s) in seq):
        yield partial + [target - s]
    
    for w in seq:
        yield from subsequences(count - 1, seq = seq, target = target, partial = partial + [w])