使用分隔符将连接的切片拆分为最大长度为N的块

def split_slices(slices, delimiter, N):
    result = []
    for slice in slices:
        if len(slice) <= N:
            result.append(slice)
        else:
            start = 0
            while start < len(slice):
                result.append(slice[start:start+N])
                start += N
    return result

# 示例用法
slices = ['abc', 'defg', 'hijkl', 'mnopqrs']
delimiter = ','
N = 3
result = split_slices(slices, delimiter, N)
print(result)