6.检查传入字典的每一个value的长度,如果大于2，那么仅保留前两个长度的内容，并将新内容返回给调用者。
dic = {"k1": "v1v1", "k2": [11,22,33,44]}
PS:字典中的value只能是字符串或列表
dic = {"k1": "v1v1", "k2": [11,22,33,44]}
def func(dic1):
for i,j in dic1.items():
if len(j) > 2:
dic1[i] = j[:2]
else:
dic1[i] = j
return dic1
print(func(dic))