◎知识点
字符串的反转
字符串的排序
◎脚本练习
#!/usr/bin/env python3 # -*- coding: utf-8 -*- """ @FileName: string_reversed_sort.py @Function: string rerversed & sort @Author: Zhihe An @Site: https://chegva.com @Time: 2021/6/24 """ """一、字符串的反转""" """ 与列表不同的是，字符串是不可变类型，因此，如果想对字符串中的所有字符进行反转， 不存在方法reverse，只能调用内置函数reversed """ s = '12345' iterator = reversed(s) print(iterator) # <reversed object at 0x10d3d2e20> print(list(iterator)) # ['5', '4', '3', '2', '1'] print(s) # 12345 """二、字符串的排序""" s = 'DBeFac' print(sorted(s)) # ['B', 'D', 'F', 'a', 'c', 'e'] print(sorted(s, reverse = True)) # ['e', 'c', 'a', 'F', 'D', 'B'] print(sorted(s, key = str.lower)) # ['a', 'B', 'c', 'D', 'e', 'F'] L = ['Python', 'java', 'Swift'] print(sorted(L, key = len)) # ['java', 'Swift', 'Python'] print(sorted(L, key = str.lower)) # ['java', 'Python', 'Swift'] L = ['Python', 'java', 'Swift'] L.sort(key = len) print(L) # ['java', 'Swift', 'Python'] L.sort(key = str.lower) print(L) # ['java', 'Python', 'Swift']
