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POCompare two different files line by line and write the difference in third file - Python
 

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  1. POCompare two different files line by line and write the difference in third file - Python
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    <p>I would like to compare two text files which have three columns each. One file has 999 rows and another has 757 rows. I want the different 242 rows to be stored in a different file. I created the first file (999 rows) using a random network generator (999 rows are edges with third column being weight between first, second columns - source, destination nodes).</p> <p><strong>File Format - Files 1, 2</strong></p> <pre><code>1 3 1 16 36 1 </code></pre> <p>I have tried</p> <p><a href="https://stackoverflow.com/questions/4544709/compare-two-files-line-by-line-and-generate-the-difference-in-another-file">Compare two files line by line and generate the difference in another file</a> and <a href="https://stackoverflow.com/questions/4078933/find-difference-between-two-text-files-with-one-item-per-line">find difference between two text files with one item per line</a> and <a href="http://www.daniweb.com/software-development/python/threads/124932/610058#post610058" rel="nofollow noreferrer">http://www.daniweb.com/software-development/python/threads/124932/610058#post610058</a></p> <p>neither worked for me.</p> <p>I think it is a problem of string comparison. I would like to compare the numbers in first column and second column. If they both are different, I want to write it to third file.</p> <p>Any help will be much appreciated!</p> <p><strong>Update</strong></p> <p>I am posting the following code that I tried after @MK posted his comment.</p> <pre><code>f = open("results.txt","w") for line in file("100rwsnMore.txt"): rwsncount += 1 line = line.split() src = line[0] dest = line[1] for row in file("100rwsnDeleted.txt"): row = row.split() s = row[0] d = row[1] if(s != src and d != dest): f.write(str(s)) f.write(' ') f.write(str(d)) f.write('\n') f.close() </code></pre>
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    1. CONot a real question. What exactly didn't work and what exactly did you try?
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    2. COWhat's wrong with good old [`diff(1)`](http://linux.die.net/man/1/diff)?
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    3. COthis has 999 lines! I need to write the difference to another file. It has written 1752 lines to a new file.
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