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我正在努力将字典写入/附加到文本文件中。使用 'a' 我的字典的形式是 {'word_one:'definition_one'}{'word_two:'definition_two'}... 而不是我认为我会得到（和想要的）{'word_one:'definition_one','word_two:'定义_两个'...}。我做错了什么。抱歉问了这么一个基本问题。我以为我理解字典和写入文本文件，但是……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,…}
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1 回答 1

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final_dict是字典列表，而不是一本字典。通过使用list.append()，您可以不断将新词典添加到该列表中。

改为将其设为字典，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，dante_dict当您可以使用时，循环遍历整个键以查看其中是否存在键是没有意义的，这是key in dict一种更快的方法。最后的del dict[key]表达式替换dante_dict.pop()代码中的表达式。

于 2013-11-09T16:40:52.203 回答