使用Python迭代嵌套列表

nested_list = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]

# 使用嵌套for循环迭代
for sublist in nested_list:
    for item in sublist:
        print(item)

# 将嵌套列表展平为一维列表
flattened_list = [item for sublist in nested_list for item in sublist]
print(flattened_list)

# 假设有一个三维列表
three_dim_list = [
    [[1, 2], [3, 4]],
    [[5, 6], [7, 8]]
]

# 迭代三维列表
for dim1 in three_dim_list:
    for dim2 in dim1:
        for item in dim2:
            print(item)

def iterate_nested_list(nested):
    for item in nested:
        if isinstance(item, list):
            iterate_nested_list(item)
        else:
            print(item)

iterate_nested_list(three_dim_list)

# 使用生成器表达式
flattened_gen = (item for sublist in nested_list for item in sublist)
for item in flattened_gen:
    print(item)