Comparing two .txt files using difflib in Python

Question

I want to compare two text files and result in the first string in the comparison file that does not match. Kindly provide a sample way to use this module?

When I try something like:

result = difflib.SequenceMatcher(None, testFile, comparisonFile)

I get an error saying:

the object of type 'file' has no len.

Answer 1

In order to remove the error, you just need to pass strings to difflib.SequenceMatcher, not files:

# Like so

difflib.SequenceMatcher(None, str1, str2)

# Or just read the files in

difflib.SequenceMatcher(None, file1.read(), file2.read())

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