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"""

list元素的排序

sort() 默认无参数是从小到大

reversed(list) 整个列表直接反过来，返回值是一个新的list

"""

import random

a_list = []

for i in range(10):

a_list.append(random.randint(0, 200))

print(a_list)

a_list.sort()

print(a_list)

a_list.sort(reverse=True) # 降序，从大到小

print(a_list)

new_list = reversed(a_list) # [12,10,7,9] -> [9,7,10,12]

print(new_list)

"""

一个学校，三个办公室， 八位老师进行随机分配办公室

"""

school = [[], [], []]

teacher_list = list("ABCDEFGH")

for name in teacher_list:

index = random.randint(0,2)

school[index].append(name)

print(school)

"""

字符串表示："", '', """"""

list表示：[]， 可修改

元组的表示：(), 元组的元素不能进行修改，

元组中如果只有一个元素的话，后面加上逗号表明是一个tuple，否则就是元素真实类型

"""

a_tuple = (1, 3.14, "Hello", True)

empty_tuple = ()

empty_tuple2 = tuple()

# 特例

b_tuple = (1) # type = int

c_tuple = (1,) # type = tuple

"""

访问元组tuple

查询的话和list一样使用count， index

"""

print(a_tuple[2])

# a_tuple[1] = "哈哈" 元组的元素不能重新赋值和修改，因为tuple是不可变的

print(a_tuple.count(1)) # 元组中1对象出现的次数是2， 因为Ture在计算机眼中就是1

print(a_tuple.index(3.14))