目录

一、列表类型内置方法(list)

1.用途：多个装备、多个爱好、多门课程，甚至是多个女朋友

2.定义：[]内可以有多个任意类型的值，逗号分隔元素

# my_girl_friend = list(['jason','tank','sean'])my_girl_friend = ['jason', 'tank', 'sean']print(f"my_girl_friend: {my_girl_friend}")

my_girl_friend: ['jason', 'tank', 'sean']

l = list('hello nick')print(f"l: {l}")

l: ['h', 'e', 'l', 'l', 'o', ' ', 'n', 'i', 'c', 'k']

3.常用操作+内置方法：常用操作和内置方法分为优先掌握（今天必须得记住）、需要掌握（一周内记住）、其他操作（了解）三个部分。

1.1 优先掌握(*****)

1. 按索引取值（正向取值+反向取值），即可存也可以取

2. 切片

3. 长度len

4. 成员运算in和not in

5. 追加append

6. 删除del

7. 循环

1.按索引取值（正向取值+反向取值），即可存也可以取

# list之索引取值name_list = ['nick', 'jason', 'tank', 'sean']name_list[0] = 'nick handsom'# name_list[1000] = 'tank sb'  # 报错print(f"name_list[0]: {name_list[0]}")

name_list[0]: nick handsom

2.切片

# list之切片name_list = ['nick', 'jason', 'tank', 'sean']print(f"name_list[0:3:2]: {name_list[0:3:2]}")

name_list[0:3:2]: ['nick', 'tank']

3.长度

# list之长度name_list = ['nick', 'jason', 'tank', 'sean']print(f"len(name_list): {len(name_list)}")

len(name_list): 4

4.成员运算in和not in

# list之成员运算in和not inname_list = ['nick', 'jason', 'tank', 'sean']print(f"'tank sb' in name_list: {'tank sb' in name_list}")print(f"'nick handsome' not in name_list: {'nick handsome' not in name_list}")

'tank sb' in name_list: False'nick handsome' not in name_list: True

5.追加值

# list之追加值name_list = ['nick', 'jason', 'tank', 'sean']name_list.append('tank sb')print(f"name_list: {name_list}")

name_list: ['nick', 'jason', 'tank', 'sean', 'tank sb']

6.删除

# list之删除name_list = ['nick', 'jason', 'tank', 'sean']del name_list[2]print(f"name_list: {name_list}")

name_list: ['nick', 'jason', 'sean']

7.循环

# list之循环name_list = ['nick', 'jason', 'tank', 'sean']for name in name_list:    print(name)

nickjasontanksean

1.2 需要掌握(****)

1. insert

2. pop

3. remove

4. count

5. index

6. clear

7. copy

8. extend

9. reverse

10. sort

1.insert()

# list之insert()name_list = ['nick', 'jason', 'tank', 'sean']name_list.insert(1, 'handsome')print(f"name_list: {name_list}")

name_list: ['nick', 'handsome', 'jason', 'tank', 'sean']

2.pop()

# list之pop()，pop()默认删除最后一个元素name_list = ['nick', 'jason', 'tank', 'sean']print(f"name_list.pop(1): {name_list.pop(1)}")print(f"name_list: {name_list}")

name_list.pop(1): jasonname_list: ['nick', 'tank', 'sean']

3.remove()

# list之remove()name_list = ['nick', 'jason', 'tank', 'sean']print(f"name_list.remove('nick'): {name_list.remove('nick')}")print(f"name_list: {name_list}")

name_list.remove('nick'): Nonename_list: ['jason', 'tank', 'sean']

4.count()

# list之count()name_list = ['nick', 'jason', 'tank', 'sean']print(f"name_list.count('nick'): {name_list.count('nick')}")

name_list.count('nick'): 1

5.index()

# list之index()name_list = ['nick', 'jason', 'tank', 'sean']print(f"name_list.index('nick'): {name_list.index('nick')}")

name_list.index('nick'): 0

6.clear()

# list之clear()name_list = ['nick', 'jason', 'tank', 'sean']name_list.clear()print(f"name_list: {name_list}")

name_list: []

7.copy()

# list之copy()name_list = ['nick', 'jason', 'tank', 'sean']print(f"name_list.copy(): {name_list.copy()}")

name_list.copy(): ['nick', 'jason', 'tank', 'sean']

8.extend()

# list之extend()name_list = ['nick', 'jason', 'tank', 'sean']name_list2 = ['nick handsome']name_list.extend(name_list2)print(f"name_list: {name_list}")

name_list: ['nick', 'jason', 'tank', 'sean', 'nick handsome']

9.reverse()

# list之reverse()name_list = ['nick', 'jason', 'tank', 'sean']name_list.reverse()print(f"name_list: {name_list}")

name_list: ['sean', 'tank', 'jason', 'nick']

10.sort()

# list之sort()，使用sort列表的元素必须是同类型的name_list = ['nick', 'jason', 'tank', 'sean']name_list.sort()print(f"name_list: {name_list}")name_list.sort(reverse=True)print(f"name_list_reverse: {name_list}")

name_list: ['jason', 'nick', 'sean', 'tank']name_list_reverse: ['tank', 'sean', 'nick', 'jason']

4.存一个值or多个值：多个值

5.有序or无序：有序

hobby_list = ['read', 'run', 'girl']print(f'first:{id(hobby_list)}')hobby_list[2] = ''print(f'second:{id(hobby_list)}')

first:4522187016second:4522187016

6.可变or不可变：可变数据类型