① 创建字典‘score:[32,35],'sex':'male', 'a':100,'name':'Alex]
② 打印字典中所有数据
③打印score对应的数据
④修改a的值为0
⑤删除score元素，增加元素class，class值为3
dic={'score':[32,35],'sex':'male', 'a':100,'name':'Alex'}
print(dic)
print(dic['score'])
dic['a']=0
del dic['score']
dic['class']=3
print(dic)