比较两个文件并从第二个文件中删除单词 Python

Question

I'm trying to compare two files and get the difference using a function.

The first file contains English words - one after the other (engwrds.txt) and the second file is a text file of web scraped text (ws.txt). What I want to achieve is to compare the two files and remove the words from ws.txt and write them to a different file.

In the web scraped file, there are words and sentences. But in the other file, the words are placed one after the other.

I tried the following code but it creates a blank output file.

with open('ws.txt', 'r', encoding='utf-8') as file1:
    with open('engwrds.txt', 'r', encoding='utf-8') as file2:
        same = set(file1).intersection(file2)

same.discard('\n')

with open('output_file.txt', 'w', encoding='utf-8') as file_out:
    for line in same:
        file_out.write(line)

Then I tried this one, which doesn't print any output at all.

from pathlib import Path

with open('engwrds.txt', 'r', encoding='utf-8') as fin:
    exclude = set(line.rstrip() for line in fin)

with fileinput.input('ws.txt', inplace=True) as f:
    for line in f:
        if not exclude.intersection(Path(line.rstrip()).parts):
            print(line, end='')

The following code also doesn't print any output.

with open('op11-Copy1.txt', 'r') as file1:
    with open('commonwords.txt', 'r') as file2:
        dif = set(file1).difference(file2)
        
dif.discard('\n')
        
with open('diff.txt', 'w') as file_out:
    for line in dif:
        file_out.write(line)

Can you please explain the mistakes I'm making here? I referred multiple examples like this , this . But I can't figure out the issue. Ideally, I want to come up with a function that achieves this task.

This is what the ws.txt file looks like.

This is what the engwrds.txt looks like.

The output file looks like this.

Answer 1

Just open your files in different variables and compare them. For Example:

Suppose that the file ws.txt (scraped file) contains:

your world is beautiful

And the file engwrds.txt contains these words (one after the other):

while world want wild

Open each one in a different variable:

with open('engwrds.txt', 'r', encoding='utf-8') as file:
    engwrds = file.read()

with open('ws.txt', 'r', encoding='utf-8') as file:
    ws = file.read()

From here engwrds and ws are strings , so you can compare them in many different ways:

differences = set(engwrds.split()).symmetric_difference(set(ws.split()))
print(differences)

Output: {'beautiful', 'is', 'want', 'while', 'wild', 'your'}

Obviously, this comparison only works if your words are separated by spaces, but from here you will have a better idea of how to solve the problem.

Answer 2

I suggest you go through this answer Compare two different files line by line in python

Wanted to add this as a comment, but I was not able to.