Python如何按第一个和第二个键值对字典排序？

Question

我正在处理一个文本文件“biones.txt”。其内容示例如下所示：

Special Type A Sunflower
2016-10-12 18:10:40
Asteraceae
Ingredient in Sunflower Oil
Brought to North America by Europeans
Requires fertile and moist soil
Full sun

Pine Tree
2018-12-15 13:30:45
Pinaceae
Evergreen
Tall and long-lived
Temperate climate

Tropical Sealion
2019-01-20 12:10:05
Otariidae
Found in zoos
Likes fish
Likes balls
Likes zookeepers

Big Honey Badger
2020-06-06 10:10:25
Mustelidae
Eats anything
King of the desert

当它的内容转换为字典输入的值时，它运行良好。
输入

def TextFileToDictionary():
    dataset = [] 
    with open(FinalFilePath, "r") as textfile:  
        sections = textfile.read().split("\n\n")
        for section in sections:                 
            lines = section.split("\n")      
            dataset.append({                
              "Name": lines[0],                 
              "Date": lines[1],              
              "Information": lines[2:]          
            })
        return dataset                          
TextFileToDictionary()

输出

[{'Name': 'Special Type A Sunflower',
  'Date': '2016-10-12 18:10:40',
  'Information': ['Asteraceae',
   'Ingredient in Sunflower Oil',
   'Brought to North America by Europeans',
   'Requires fertile and moist soil',
   'Full sun']},
 {'Name': 'Pine Tree',
  'Date': '2018-12-15 13:30:45',
  'Information': ['Pinaceae',
   'Evergreen',
   'Tall and long-lived',
   'Temperate climate']},
 {'Name': 'Tropical Sealion',
  'Date': '2019-01-20 12:10:05',
  'Information': ['Otariidae',
   'Found in zoos',
   'Likes fish',
   'Likes balls',
   'Likes zookeepers']},
 {'Name': 'Big Honey Badger',
  'Date': '2020-06-06 10:10:25',
  'Information': ['Mustelidae', 'Eats anything', 'King of the desert']}]

正如所观察到的，输出包含多个字典，没有名称

目前，我正在尝试创建一些函数，这些函数将按照
1）第一个键值（按字母顺序）和
2）第二个键值（按最新日期）对字典进行排序

我的进展情况如下：

import itertools
import os

MyFilePath = os.getcwd() 
ActualFile = "creatures.txt"
FinalFilePath = os.path.join(MyFilePath, ActualFile) 

def TextFileToDictionaryName():
    dataset = [] 
    with open(FinalFilePath, "r") as textfile:  
        sections = textfile.read().split("\n\n")
        for section in sections:                 
            lines = section.split("\n")      
            dataset.append({                
              "Name": lines[0],                 
              "Date": lines[1],              
              "Information": lines[2:]          
            })
            dataset.sort(key=lambda x: x[0]['Name'], reverse=False)
        return dataset                          
TextFileToDictionaryName()

def TextFileToDictionaryDate():
    dataset = [] 
    with open(FinalFilePath, "r") as textfile:  
        sections = textfile.read().split("\n\n")
        for section in sections:                 
            lines = section.split("\n")      
            dataset.append({                
              "Name": lines[0],                 
              "Date": lines[1],              
              "Information": lines[2:]          
            })
            dataset.sort(key=lambda x: x[1]['Date'], reverse=True)
        return dataset                          
TextFileToDictionaryDate()

但是，我遇到了一个错误“KeyError:0”。我不知道如何解决它。
我也不确定如何将字典输出转换回字符串格式，就像前面的“bioters.txt”文件的内容一样

有人知道如何修复代码吗

非常感谢

Answer 1

你就快到了，只是不要做x[0]或x[1]。 另外，我认为您不应该在循环的每次迭代中对列表进行排序，而应该只在循环的最后进行排序

def TextFileToDictionaryName():
    dataset = [] 
    with open(FinalFilePath, "r") as textfile:  
        sections = textfile.read().split("\n\n")
        for section in sections:                 
            lines = section.split("\n")      
            dataset.append({                
              "Name": lines[0],                 
              "Date": lines[1],              
              "Information": lines[2:]          
            })
        dataset.sort(key=lambda x: x['Name'], reverse=False)
        return dataset                          
TextFileToDictionaryName()

def TextFileToDictionaryDate():
    dataset = [] 
    with open(FinalFilePath, "r") as textfile:  
        sections = textfile.read().split("\n\n")
        for section in sections:                 
            lines = section.split("\n")      
            dataset.append({                
              "Name": lines[0],                 
              "Date": lines[1],              
              "Information": lines[2:]          
            })
        dataset.sort(key=lambda x: x['Date'], reverse=True)
        return dataset                          
TextFileToDictionaryDate()