问题:字典 循环输出 报错 1.报错信息 raceback (most recent call last): File "/Users/ainominako/Desktop/宋学慧/magicans.py", line 3, in <module> for k,v in dict_1: ValueError: not enough values to unpack (expected 2, got 1) 2.源代码 dict_1 = { "赵":1,"钱":2,"孙":3