1.将嵌套列表通过生成器打印出来。

将嵌套列表通过生成器打印出来。list_a = [[1,2],[3,4],[5,6],[7,8]]

list_a = [[1,2],[3,4],[5,6],[7,8]]
generator = (x for item in list_a for x in item) # 生成器表达式
for g in generator:
    print(g)

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

for item in list_a:
    for sub in item:
        print(sub)