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python练习:字典value值排序,key值排序

时间:2019-11-12 13:35:15      阅读:100      评论:0      收藏:0      [点我收藏+]

标签:port   lis   nbsp   list   com   lam   分割   列表   mon   

#字典value值排序,key值排序
from random import *
dict1 = {x:randint(5,12) for x in "aijwt"}
dict2 = {randint(5,12):y for y in "aibjwte"}
print (dict1:,dict1)
print (dict2:,dict2)

print ("将字典按value倒序显示,办法(collections的Counter):")
from collections import Counter
dict11 = Counter(dict1).most_common()                   #转为列表
dict22 = Counter(dict2).most_common()                   #转为列表
print(dict1按value倒序显示:,dict(dict11))              #转为字典显示
print(dict2按value倒序显示:,dict(dict22))              #转为字典显示


print ("将字典按key正序显示")
dict12 = list(dict1.items())
dict12.sort(key=lambda x:x[0])    #按照列表中元组元素的的第一个元素排序
print(dict1按key正序显示:,dict12)


print ("将字典按value正序显示")
dict13 = list(dict1.items())
dict13.sort(key=lambda x:x[1])    #按照列表中元组元素的的第二个元素排序
print(dict1按value正序显示:,dict13)


print(\n==========================分割一下=================================\n)
a1= list(dict1)                             #字典key转为列表
a2= list(dict1.items())                     #字典元素转为列表
a3= [i for i in dict1.items()]              #字典元素转为列表

print(dict1:,dict1)
print(list(dict1) :,a1)
print(list(dict1.items()) :,a2)
print([i for i in dict1.items()]:,a3)


#列表转为字典
print(dict(a3))

结果:

dict1: {a: 7, i: 7, j: 7, w: 11, t: 11}
dict2: {12: j, 5: i, 8: b, 9: w, 7: t, 11: e}
将字典按value倒序显示,办法(collections的Counter):
dict1按value倒序显示: {w: 11, t: 11, a: 7, i: 7, j: 7}
dict2按value倒序显示: {9: w, 7: t, 12: j, 5: i, 11: e, 8: b}
将字典按key正序显示
dict1按key正序显示: [(a, 7), (i, 7), (j, 7), (t, 11), (w, 11)]
将字典按value正序显示
dict1按value正序显示: [(a, 7), (i, 7), (j, 7), (w, 11), (t, 11)]

==========================分割一下=================================

dict1: {a: 7, i: 7, j: 7, w: 11, t: 11}
list(dict1) : [a, i, j, w, t]
list(dict1.items()) : [(a, 7), (i, 7), (j, 7), (w, 11), (t, 11)]
[i for i in dict1.items()]: [(a, 7), (i, 7), (j, 7), (w, 11), (t, 11)]
{a: 7, i: 7, j: 7, w: 11, t: 11}

Process finished with exit code 0

 

python练习:字典value值排序,key值排序

标签:port   lis   nbsp   list   com   lam   分割   列表   mon   

原文地址:https://www.cnblogs.com/jxba/p/11840798.html

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