比较两个文件并在Python中找到匹配的单词 [英] compare two file and find matching words in python

问题描述

我有两个文件：第一个包括条款和他们的频率：

pre code表2
苹果4
铅笔89

第二个文件是字典：

 国外
苹果
面包
 ... 
  

我想检查第一个文件是否包含第二个文件中的任何单词。例如，第一个文件和第二个文件都包含apple。
我是python的新手。
我尝试了一些东西，但是不起作用。你可以帮帮我吗 ？谢谢

  for line in dictionary：
 words = line.split（）
 print words [0 ] 
 
 for line2 in test：
 words2 = line2.split（）
 print words2 [0] 
   
 
解决方案
类似于这样： 
 
 
 打开（file1）为f1，打开（file2）为f2：
 words = set（line.strip（）为f1中的行）＃从字典文件$ b $创建一组单词b 
＃为什么设置？集合提供了一个O（1）查找，所以整体的复杂度是O（N）
 
 #now循环其他文件（word，freq文件）的每一行
在f2中的行：
单词，freq = line.split（）#fetch单词，freq 
如果单词在单词中：#if单词在单词集中找到然后打印
打印单词
  
 输出：  
 
 
  apple 
  
 
I have a two file: the first one includes terms and their frequency:
table 2
apple 4
pencil 89
The second file is a dictionary:
abroad
apple
bread
...
I want to check whether the first file contains any words from the second file. For example both the first file and the second file contains "apple".
I am new to python.
I try something but it does not work. Could you help me ? Thank you
for line in dictionary:
    words = line.split()
    print words[0]

for line2 in test:
    words2 = line2.split()
    print words2[0]

解决方案
Something like this:
with open("file1") as f1,open("file2") as f2:
    words=set(line.strip() for line in f1)   #create a set of words from dictionary file

    #why sets? sets provide an O(1) lookup, so overall complexity is O(N)

    #now loop over each line of other file (word, freq file)
    for line in f2:
        word,freq=line.split()   #fetch word,freq 
        if word in words:        #if word is found in words set then print it
            print word
output:
apple


                        
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