如何根据列表中字典的key对列表进行筛选

Stubborn

给定下面列表，不适用模块的情况下，如何对p列表排序（依照'shares'或者'prices'进行排序）

1. p=[{'name':'ibm','shares':100,'prices':91.11},
   
2.    {'name':'apple','shares':50,'prices':543.31},
   
3.    {'name':'t','shares':150,'prices':21.51},
   
4.    {'name':'mi','shares':30,'prices':441.16},
   
5.    {'name':'360','shares':10,'prices':61.81},
   
6.    {'name':'car','shares':80,'prices':221.51}
   
7. ]

复制代码

yjsx86

1. # 按照prices排序
   
2. p = [{'name': 'ibm', 'shares': 100, 'prices': 91.11},
   
3.      {'name': 'apple', 'shares': 50, 'prices': 543.31},
   
4.      {'name': 't', 'shares': 150, 'prices': 21.51},
   
5.      {'name': 'mi', 'shares': 30, 'prices': 441.16},
   
6.      {'name': '360', 'shares': 10, 'prices': 61.81},
   
7.      {'name': 'car', 'shares': 80, 'prices': 221.51}]
   
8. 
   
9. new_p = sorted(p, key=lambda x: x['prices'])
   
10. 
    
11. print(new_p)
    
12. 
    
13. #结果
    
14. [{'name': 't', 'shares': 150, 'prices': 21.51},
    
15. {'name': '360', 'shares': 10, 'prices': 61.81},
    
16. {'name': 'ibm', 'shares': 100, 'prices': 91.11},
    
17. {'name': 'car', 'shares': 80, 'prices': 221.51},
    
18. {'name': 'mi', 'shares': 30, 'prices': 441.16},
    
19. {'name': 'apple', 'shares': 50, 'prices': 543.31}]
    
20. 
    
21. #先按prices排序再按shares排序,把除了21.51和543.31的其他prices全部改为99.11
    
22. p = [{'name': 'ibm', 'shares': 100, 'prices': 91.11},
    
23.      {'name': 'apple', 'shares': 50, 'prices': 543.31},
    
24.      {'name': 't', 'shares': 150, 'prices': 21.51},
    
25.      {'name': 'mi', 'shares': 30, 'prices': 91.11},
    
26.      {'name': '360', 'shares': 10, 'prices': 91.11},
    
27.      {'name': 'car', 'shares': 80, 'prices': 91.11}]
    
28. 
    
29. new_p = sorted(p, key=lambda x: (x['prices'], x['shares']))
    
30. 
    
31. print(new_p)
    
32. 
    
33. #结果
    
34. [{'name': 't', 'shares': 150, 'prices': 21.51},
    
35. {'name': '360', 'shares': 10, 'prices': 91.11},
    
36. {'name': 'mi', 'shares': 30, 'prices': 91.11},
    
37. {'name': 'car', 'shares': 80, 'prices': 91.11},
    
38. {'name': 'ibm', 'shares': 100, 'prices': 91.11},
    
39. {'name': 'apple', 'shares': 50, 'prices': 543.31}]

复制代码

xy123151

1. 
   
2. p_sort = []
   
3. for i,each in enumerate(p):
   
4.     p_sort.append([each['shares'],i])
   
5. p_sort.sort()
   
6. p2 = p[:]
   
7. for i,each in enumerate(p_sort):
   
8.     p[i]=p2[each[1]]
   
9. print(p)

复制代码

13572044595

http://www.runoob.com/python3/python3-att-list-sort.html

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