如何使一個字典，對於關鍵是單詞在英語和值希臘字（UTF-8），我得到一個KeyError，當我嘗試獲得值

Question

我試圖說明翻譯字典即：

• 當一個英文單詞給出我回到含義希臘（UTF-8）

  #Possible Content Of File: 
  #"Hello,Γεια\n" 
  #"Car,Αμαξι\n" 
  
  with codecs.open("dict.txt",'r',encoding='utf8') as f: 
      lines= f.read() #contains all the lines of the file 
  
  word=raw_input("Word To Find\n") 
  flag=0 
  temp="" 
  temp2="" 
  dictionary={} 
  #here is an algorithm i came up with, to seperate the string and get on temp the key 
  #and on temp2 the value , then i add them on the dictionary 
  for i in range(0,len(lines)): 
      if flag==0: 
       temp+=lines[i] 
      if lines[i]==',': 
       flag=1 
       continue 
      if lines[i]=='\n': 
       flag=0 
       dictionary.update({temp:temp2}) #adding the key and the value 
       #(the value is in utf-8) 
       temp="" 
       temp2="" 
      if flag==1: 
       temp2+=lines[i] 
  
  #print(dictionary.keys()) # [u'Hello,',u'Car,'] 
  #print(dictionary.get(word)) returns None 
  print(dictionary[word])# KeyError 
  

Note: The file contains this kind of strings: "Hello,Γεια\n" and "Car,Αμαξι\n"

Error: print(dictionary[word]) throws a KeyError

This is Python 2.7

感謝很多提前

Answer 1

該問題的實現需要兩個循環。外環穿過線，通過當前行的字符內循環，例如：

for line in lines: 
    for i in range(0, len(line)): 
     # Then using line[i] instead of lines[i] 

另外，read()獲得了整個內容，readlines()是正確的功能。

以下實施方式使用split(',')來分隔一行中的單詞。 另外，字典可以通過簡單的dictionary[key] = value進行更新。 進口編碼解碼器

with codecs.open("dict.txt", 'r', encoding='utf8') as f: 
    lines = f.readlines() 

word=raw_input("Word To Find\n") 
dictionary={} 
for line in lines: 
    if ',' in line: 
     key, value = line.split(',') 
     dictionary[key.strip()] = value.strip() 
    else: 
     print('Cannot parse line: ' + line) 

if word in dictionary: 
    print(dictionary[word]) 
else: 
    print('Error: Translation not found.') 

以前的實現假定該值沒有逗號。 以下版本允許逗號值：

for line in lines: 
    comma_index = line.index(',') 
    if comma_index >= 0: 
     key = line[0:comma_index] 
     value = line[comma_index + 1:] 
     dictionary[key.strip()] = value.strip() 
    else: 
     print('Cannot parse line: ' + line) 

Answer 2

你的分裂算法有點越野車，並且有內置支持做在python相同的任務，你爲什麼要推倒重來？

import io 
with io.open("test.txt",'r',encoding='utf8') as f: 
     list_of_lines= f.read().splitlines() #contains all the lines of the file in a list 


dictionary={} 

for line in list_of_lines: 
    eng, greek = line.split(',') # split(',') will split the string by ',' and make a list out of it 
    dictionary[eng] = greek 

print(dictionary['Hello'])