data1 = open("a.txt", 'r').readline().strip().split(',')
data2 = open("b.txt", 'r').readline().strip().split(',')
res = list((set(data1) - set(data2)).union(set(data2) - set(data1)))

how can I do the above but with multiple txt files? they are comma seperated, and in lines. I want to find matching words given data1.

data1 == data2

data1 == data3

data1 == data4

...

From:compare two file and find matching words in python

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 the same words found in both files:

apple

The output in my case should be words found in those files that are also found in data1... any idea is much appreciated!

CodePudding user response：

The code you already have does pretty much everything you want. I couldn't understand exactly what you wanted but I guessed one of two things

1. You want the words present in data1 & data2, data1 & data3, data1 & data4

   For this, you can store the words in a single list instead of printing them and run the same loop for all multiple files

2. You want the words present in data1 & data2 & data3 & data4 For this, you can store the words for each, but in separate lists, and get the intersection of these lists (you can use a list of lists here for convenience)

Let me know if this works!