讀取文本文件並將其與Python中的字典鍵相匹配

Question

我有一個用python編寫的字典。我也有一個文本文件，每行是不同的單詞。我想根據字典的鍵檢查文本文件的每一行，並且如果文本文件中的行與我想將該鍵的值寫入輸出文件的鍵匹配。是否有捷徑可尋。這甚至有可能嗎？我是編程新手，無法完全掌握如何訪問字典。感謝您的幫助。

Answer 1

逐行讀取一個文件中的行是這樣的：

with open(filename, 'r') as f: 
    for line in f: 
     value = mydict.get(line.strip()) 
     if value is not None: 
      print value 

這將打印的每個值到標準輸出。如果你想輸出到一個文件，它會是這樣的：

with open(infilename, 'r') as infile, open(outfilename, 'w') as outfile: 
    for line in infile: 
     value = mydict.get(line.strip()) 
     if value is not None: 
      outfile.write(value + '\n') 

Answer 2

以下代碼已經爲我工作。

# Initialize a dictionary 
dict = {} 

# Feed key-value pairs to the dictionary 
dict['name'] = "Gautham" 
dict['stay'] = "Bangalore" 
dict['study'] = "Engineering" 
dict['feeling'] = "Happy" 

# Open the text file "text.txt", whose contents are: 
#################################### 
## what is your name 
## where do you stay 
## what do you study 
## how are you feeling 
#################################### 

textfile = open("text.txt",'rb') 

# Read the lines of text.txt and search each of the dictionary keys in every 
# line 

for lines in textfile.xreadlines(): 
    for eachkey in dict.keys(): 
     if eachkey in lines: 
      print lines + " : " + dict[eachkey] 
     else: 
      continue 

# Close text.txt file 
textfile.close()