python sorted()函数

# -*- coding: utf-8 -*-
#coding=utf-8
'''
@author: tomcat
@license: (C) Copyright 2017-2019, Personal exclusive right.
@contact: liliang07@yungengxin.com
@software: coding
@file: sorted.py
@time: 2019/7/24 16:27
'''

'''
sorted()函数是一个高阶函数，它还可以接收一个key函数来实现自定义的排序

'''
a=sorted(['bob', 'about', 'Zoo', 'Credit'], key=lambda x:x.lower(), reverse=True)
print(a)
a=sorted(['bob', 'about', 'Zoo', 'Credit'],  reverse=True)
print(a)
'''

忽略字母大小写，进行名字排序
'''
params_original = sorted( [('bob', 75), ('adam', 92), ('cart', 66), ('Eisa', 88)], key = lambda a:a[0].lower())
print("忽略字母大小写，进行名字排序"+str(params_original))

'''
按成绩从低到高排序：
'''
params_original = sorted( [('bob', 75), ('adam', 92), ('cart', 66), ('Eisa', 88)], key = lambda a:a[1])
print("按成绩从低到高排序："+str(params_original))

'''
按成绩从高到低排序：
'''
params_original = sorted( [('bob', 75), ('adam', 92), ('cart', 66), ('Eisa', 88)], key = lambda a:a[1],reverse=True)
print("按成绩从高到低排序："+str(params_original))

'''
忽略字母大小写，对req字典按key排序
'''
req = {"channel":"guanwang","systemOs":"vivo","clientVer":"1.3.1","clientId":"5b3b4510e48cc6703a96102f19beec1b","loginPlatform":"android","loginToken":"","timeStamp":1563434953,"sign":"4efb209fb3021e09f737f3dc4a6ddec4"}
params_original = sorted( req.items(), key = lambda a:a[0].lower())
print("忽略字母大小写，对req字典按key排序："+str(params_original))

　　

['bob', 'about', 'Zoo', 'Credit']
忽略字母大小写，进行名字排序[('adam', 92), ('bob', 75), ('cart', 66), ('Eisa', 88)]
按成绩从低到高排序：[('cart', 66), ('bob', 75), ('Eisa', 88), ('adam', 92)]
按成绩从高到低排序：[('adam', 92), ('Eisa', 88), ('bob', 75), ('cart', 66)]
忽略字母大小写，对req字典按key排序：[('channel', 'guanwang'), ('clientId', '5b3b4510e48cc6703a96102f19beec1b'), ('clientVer', '1.3.1'), ('loginPlatform', 'android'), ('loginToken', ''), ('sign', '4efb209fb3021e09f737f3dc4a6ddec4'), ('systemOs', 'vivo'), ('timeStamp', 1563434953)]