day17——其他内置函数

zip函数：

print(list(zip(('a','b','c'),(1,2,3))))
p={'name':'alex','age':18,'gender':'none'}
print(list(zip(p.keys(),p.values())))
print(list(p.keys()))
print(list(p.values()))
print(list(zip(['a','b'],'12345')))

l=[1,3,100,-1,2]
print(max(l))
dic={'age1':18,'age2':10}
print(max(dic))# 比较的是key
print(max(dic.values()))#比较的是key,但是不知道是哪个key对应的
print(max(zip(dic.values(),dic.keys())))

people=[{'name':'alex','age':1000},
        {'name': 'wupeiqi', 'age': 10000},
        {'name': 'yuanhao', 'age': 9000},
        {'name':'linhaifeng','age':18},
        ]
print(max(people,key=lambda dic:dic['age']))
# max(people,key=lambda dic:dic['age'])
print(max(people,key=lambda dic:dic['age']))
# ret=[]
# for item in people:
#     ret.append(item['age'])
# print(ret)

# print(chr(400))  #打印在ASCII表中对应的字符
# print(ord('*')) #打印在ASCII表中对应的数字
# print(pow(10,3))
#print(pow(3,3,2))#3*3%2
# l=[1,2,3,4]
# print(list(reversed(l)))  #反转
#print(round(3.5))#四舍五入
#print(set('hello'))#变成集合的形式
# l='hello'
# s1=slice(3,5)
# s2=slice(1,4,2)
# print(l[s1])
# print(l[s2])
# print(s2.start)
# print(s2.stop)
# print(s2.step)
# l=[3,4,2,7,9,9]
# print(sorted(l))#排序本质上就是比较大小，不同类型之间不可以比较

people=[{'name':'alex','age':1000},
        {'name': 'wupeiqi', 'age': 10000},
        {'name': 'yuanhao', 'age': 9000},
        {'name':'linhaifeng','age':18},
        ]
print(sorted(people,key=lambda dic:dic['age']))