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题目 1: just print a+b
挑战python栏目的所有题目,题目中所给变量使用前不用声明,也不用赋值,系统自动赋值。 如本题,只需一行代码即可: print a + b 系统会自动为a和b赋值,并检查代码执行结果和标准答案是否相同。 给你一字典a,如a={1:1,2:2,3:3},输出字典a的key,以','链接,如 ...
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