Python 根据两个字段排序 中文排序 汉字排序 升序 降序
Python 根据两个字段排序 中文排序 汉字排序 升序 降序
Python 根据两个字段排序 中文排序 汉字排序 升序 降序
Python3写法
代码
# -*- coding: utf-8 -*-
# 需求:年龄倒序,姓名正序
from itertools import chain
from pypinyin import pinyin, Style
class Student:
def __init__(self, name, age):
self.name = name
self.age = age
def to_pinyin(stu):
lst = pinyin(stu.name, style=Style.TONE3) # 例:[['zhang1'], ['san1']]
print(lst)
iterator = chain.from_iterable(lst) # 迭代器
iterator_for_print = chain.from_iterable(lst) # 迭代器
print(iterator_for_print)
for item in iterator_for_print:
print(item)
# 写法一
return ''.join(iterator)
# 写法二
# return ''.join(chain.from_iterable(pinyin(stu.name, style=Style.TONE3)))
studentList = [
Student("张三", 25),
Student("小红", 22),
Student("王五", 25),
Student("小张", 22),
Student("李四", 25),
Student("小明", 22)
]
# 写法一
# studentList.sort(key=lambda stu: pinyin(stu.name, style=Style.TONE3))
# 写法二
studentList.sort(key=lambda stu: to_pinyin(stu))
studentList.sort(key=lambda stu: stu.age, reverse=True)
print("排序结果:")
for student in studentList:
print(str(student.age) + " " + student.name)
输出结果
Python2写法
代码
# -*- coding: utf-8 -*-
# 需求:年龄倒序,姓名正序
from itertools import chain
from pypinyin import pinyin, Style
class Student:
def __init__(self, name, age):
self.name = name
self.age = age
def to_pinyin(stu):
lst = pinyin(stu.name.decode("utf-8"), style=Style.TONE3) # 例:[['zhang1'], ['san1']]
print(lst)
iterator = chain.from_iterable(lst) # 迭代器
iterator_for_print = chain.from_iterable(lst) # 迭代器
print(iterator_for_print)
for item in iterator_for_print:
print(item)
# 写法一
return ''.join(iterator)
# 写法二
# return ''.join(chain.from_iterable(pinyin(stu.name.decode("utf-8"), style=Style.TONE3)))
studentList = [
Student("张三", 25),
Student("小红", 22),
Student("王五", 25),
Student("小张", 22),
Student("李四", 25),
Student("小明", 22)
]
# 写法一
# studentList.sort(key=lambda stu: pinyin(stu.name.decode("utf-8"), style=Style.TONE3))
# 写法二
studentList.sort(key=lambda stu: to_pinyin(stu))
studentList.sort(key=lambda stu: stu.age, reverse=True)
print("排序结果:")
for student in studentList:
print(str(student.age) + " " + student.name)
输出结果
C#的示例
代码
List<Student> list = new List<Student>()
{
new Student("张三", 25),
new Student("小红", 22),
new Student("王五", 25),
new Student("小张", 22),
new Student("李四", 25),
new Student("小明", 22)
};
//方法一,虽然写法繁琐,但思路清晰
list.Sort((a, b) =>
{
if (a.Age != b.Age)
{
return b.Age - a.Age;
}
else
{
return string.Compare(a.Name, b.Name);
}
});
//方法二,简捷清晰明了
//list = list.OrderByDescending(a => a.Age).ThenBy(a => a.Name).ToList();
foreach (var item in list)
{
Console.WriteLine(item.Age + " " + item.Name);
}
Console.Read();
class Student
{
public string Name { get; set; }
public int Age { get; set; }
public Student(string name, int age)
{
Name = name;
Age = age;
}
}
输出结果
对比C#,Python的坑
- Python默认的中文排序得不到预期的结果,需要引用pypinyin库解决,相当麻烦