从嵌套列表创建项目？

nested_list = [1, [2, 3], [4, [5, 6], 7]]

def flatten_list(nested_list):
    flat_list = []
    for item in nested_list:
        if isinstance(item, list):
            flat_list.extend(flatten_list(item))
        else:
            flat_list.append(item)
    return flat_list

nested_list = [1, [2, 3], [4, [5, 6], 7]]
flat_list = flatten_list(nested_list)
print(flat_list)  # 输出: [1, 2, 3, 4, 5, 6, 7]

def flatten_list_iterative(nested_list):
    stack = [iter(nested_list)]
    flat_list = []
    while stack:
        try:
            item = next(stack[-1])
            if isinstance(item, list):
                stack.append(iter(item))
            else:
                flat_list.append(item)
        except StopIteration:
            stack.pop()
    return flat_list

nested_list = [1, [2, 3], [4, [5, 6], 7]]
flat_list = flatten_list_iterative(nested_list)
print(flat_list)  # 输出: [1, 2, 3, 4, 5, 6, 7]