python使用自定义函数和lambda表达式指定排序规则对考试分数降序排列（附源码可直接使用）

谁借莪１个温暖的怀抱￠ 2023-09-30 17:00 3阅读 0赞

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## 一、自定义排序规则 ##

自定义rulesort函数规定排序规则 并且按照分数降序排列后效果如下

![7422c81e013e4e42b178deda3945713c.png][]

def rulesort(elem):  # 定义排序规则
       
    print("自定义排序规则")
    list_dict = [{"name":"小黑子","python":99,"c":89},
                {"name":"小鸡子","python":100,"c":80},
                {"name":"ikun","python":95,"c":97},
                {"name":"背带裤","python":91,"c":96}]
    print("对列表排序前：")
    for d in list_dict:
        print(d)
    list_dict.sort(key = rulesort ,reverse = True)  # 降序排列
    print("对列表排序后：")
    
        print(d)

## 二、使用lambda表达式 ##

使用lambda表达式按照考试分数进行降序排列后效果如下

![cbd0e63db05e4aa8b7c0899d38b24542.png][]

代码如下

print("lambda表达式")
    list_dict = [{"name":"小黑子","python":99,"c":89},
                {"name":"小鸡子","python":100,"c":80},
                {"name":"ikun","python":95,"c":97},
                {"name":"背带裤","python":91,"c":96}]
    
    print("对列表排序前：")
    for d in list_dict:
        print(d)
    list_dict.sort(key = lambda x :x['python'] ,reverse = True)  # 降序排列
    
    print("对列表排序后：")
    for d in list_dict:
        print(d)

[7422c81e013e4e42b178deda3945713c.png]: https://img-blog.csdnimg.cn/7422c81e013e4e42b178deda3945713c.png
[cbd0e63db05e4aa8b7c0899d38b24542.png]: https://img-blog.csdnimg.cn/cbd0e63db05e4aa8b7c0899d38b24542.png