Question

我正在努力将字典写入/附加到文本文件中。使用'a'我的词典的格式为{'word_one：'definition_one'} {'word_two：'definition_two'} ...而不是我想的我会得到（并且想要）{'word_one：'definition_one'，'word_two：' definition_two'...}。我做错了什么对不起这个基本问题。我以为我理解字典和写文本文件，但...... 代码是：

import ast
import operator

def collectDict():

     # first initialize your final_dict and dante_dict dictionary
     final_dict={}
     with open('/Users/admin/Desktop/Dante Dictionary/experimental_dict.txt','r', encoding = "utf-8") as dic:
             dante_dict = ast.literal_eval(dic.read())# reads text as a dictionary


     (dante_dict,final_dict) = define_words(dante_dict,final_dict)    # call the define_words function to update your dictionaries


     # write your dictionaries

     with open('/Users/admin/Desktop/Dante Dictionary/experimental_dict.txt', 'w', encoding = 'utf-8') as outfile:
             outfile.write(str(dante_dict)) # writes source dictionary minus newly-defined term

     with open('/Users/admin/Desktop/Dante Dictionary/trial_dictionary.txt', 'a', encoding = 'utf-8') as finalfile:
             finalfile.write(str(final_dict)) 
     with open('/Users/admin/Desktop/Dante Dictionary/trial_dictionary.txt', 'r', encoding = 'utf-8') as finalfile:
          prelim_dict = ast.literal_eval(finalfile.read())
          print(prelim_dict)


def define_words(dante_dict,final_dict):
   # your already written function without the initialization (first 3 lines) and file writing part
   print('There were ', len(dante_dict), ' entries before defining this word') 
   key_to_find = max(dante_dict.items(), key=operator.itemgetter(1))[0]
   print('The next word to define is ', key_to_find) # show which word needs defining

   definition = input('Definition ? : ') # prompt for definition
   final_dict = {}

   if key_to_find in dante_dict:
       final_dict.append[key_to_find] = definition
       del dante_dict[key_to_find] # remove entry from source dictionary once new definition is done
   print('the end length is : ' ,len(dante_dict)) # check that entry has been removed from source

   return(dante_dict,final_dict)  # you return the dictionaries for the other function

我开始的文本文件是：

{'amico   ': 1, "'Segnor": 1, 'volgere': 1, 'spaventate,': 1, "s'avvantaggia": 1, 'livore': 1, 'disposta   ': 1, 'pennelli': 1, 'atto': 15, 'Berti': 1, 'atti': 7, 'Gaia    ': 1, 'alzato,': 1, 'reda': 2, "d'ossa": 1, 'rede': 1, 'solvesi': 1, 'Dopo': 3, 'amico,': 1, 'Sardi,': 1, 'pastore,': 2, 'sana   ': 1,…}

Answer 1

final_dict是一个列表的词典，而不是一个词典。通过使用list.append()，您可以继续向该列表添加新词典。

改为使其成为字典，然后分配给该字典上的键：

final_dict = {}

if key_to_find in dante_dict:
    final_dict[key_to_find] = definition
    del dante_dict[key_to_find]

请注意，当您可以使用dante_dict（一种更快的方法）时，循环遍历整个key in dict键以查看是否存在密钥是没有意义的。最后的del dict[key]表达式替换了代码中的dante_dict.pop()表达式。

使用append的Python返回多个词典

1 个答案: