使用模数运算符 % .

def split_by_n(n, lst):
  final = []
  sublist = []
  for i in range(0, len(lst)):
    if i % n != 0: # if i/n has no remainders
      sublist.append(lst[i])
    elif i != 0: # Reached the end of a sublist. Append to parent and reset.
      final.append(sublist)
      sublist = []
      sublist.append(lst[i])
    else: # 0 mod n is 0, so just make sure to add it anyways
      sublist.append(lst[i])
  final.append(sublist)
  return final