💡大纲
⭕列表、元组、字符串都是序列，列表是可变序列，元组和字符串是不可变序列
一、跟序列相关的操作符
（一）+（拼接）*（重复）
- 对于可变序列：列表来说，在对其进行重复操作后，id值不变
- 对于不可变序列：元组、字符串来说，重复操作后id值会变化，因为不能对其本身进行直接操作，是创建了一个新的变量
（二）同一性运算符：is is not
（三）包含问题：in not in
（四）删除一个或多个指定对象：del
二、跟序列相关的函数
（一）列表、元组、字符串相互转换
1、可迭代对象转换为列表
list("fishc") # ['f', 'i', 's', 'h', 'c']
list((1,2,3,4,5)) # [1, 2, 3, 4, 5]2、可迭代对象转换为元组
tuple("fishc") # ('f', 'i', 's', 'h', 'c')
tuple([1,2,3,4,5]) # (1, 2, 3, 4, 5)3、可迭代对象转换为字符串
age = 24
print("My age is "+str(age)) # My age is 24（二）min() max()
s = [1,1,2,3,5]
min(s)
x = "fishc"
min(x) # 'c'（三）len() sum()
（四）sorted() reversed()
list1 = [2, 5, 2, 8, 19, 3, 7]
list2 = sorted(list1)
print(list1) # [2, 5, 2, 8, 19, 3, 7]
print(list2) # [2, 2, 3, 5, 7, 8, 19]
sorted(list1, reverse = True) # [19, 8, 7, 5, 3, 2, 2] 降序t = ["Apple","Banana","Fishc","Pen","Book"]
sorted(t) # ['Apple', 'Banana', 'Book', 'Fishc', 'Pen']
sorted(t,key=len) # ['Pen', 'Book', 'Apple', 'Fishc', 'Banana']s = [1,2,5,8,0]
reversed(s) # 一个迭代器<list_reverseiterator at 0x1f27215f5b0>
list(reversed(s)) # [0, 8, 5, 2, 1]（五）all() any()
1、any()
👉有一个为真就返回True
2、all()
👉全真，则返回True
print(any([False,1,0,None]))
print(all([False,1,0,None]))（六）enumerate()
seasons = ["Spring","Sunmmer","Fall","Winter"]
enumerate(seasons) # <enumerate at 0x1f27255f650>
list(enumerate(seasons)) # [(0, 'Spring'), (1, 'Sunmmer'), (2, 'Fall'), (3, 'Winter')]
list(enumerate(seasons,10)) # [(10, 'Spring'), (11, 'Sunmmer'), (12, 'Fall'), (13, 'Winter')]（七）zip()
x = [1,2,3]
y = [4,5,6]
zipped = zip(x,y)
list(zipped) # [(1, 4), (2, 5), (3, 6)]
tuple(zipped) # ((1, 4), (2, 5), (3, 6))
str(zipped) # '<zip object at 0x000001F271EB33C0>'（八）map()
mapped = map(ord,"FishC")
list(mapped) # [70, 105, 115, 104, 67]mapped = map(pow,[2,3,10],[5,2,3])
list(mapped) # [32, 9, 1000]list(map(max,[1,2,5],[2,2,2],[0,3,9,8])) # [2, 3, 9] 第三个参数的8是没有可比较的对象的（九）filter() 过滤器
list(filter(str.islower,"FishC")) # ['i', 's', 'h']三、迭代器 vs 可迭代对象
（一）iter()
x = [1,2,3,4,5]
y = iter(x) # y成为一个迭代器
type(x) # list
type(y) # list_iterator 列表迭代器（二）next()
next(y) # 1
next(y)
next(y)
next(y)
next(y) # 5
next(y) # 在将迭代器都输出结束后，会输出一个异常z = iter(x)
next(z,"没啦")
next(z,"没啦")
next(z,"没啦")
next(z,"没啦")
next(z,"没啦")
next(z,"没啦") # 输出结束后会抛出给定的内容