Comparing two .txt files using difflib in Python
For starters, you need to pass strings to difflib.SequenceMatcher, not files:
# Like sodifflib.SequenceMatcher(None, str1, str2)# Or just read the files indifflib.SequenceMatcher(None, file1.read(), file2.read())That'll fix your error anyway. To get the first non-matching string, I'll direct you to the wonderful world of difflib documentation.
Are you sure both files exist ?
Just tested it and i get a perfect result.
To get the results i use something like:
import difflibdiff=difflib.ndiff(open(testFile).readlines(), open(comparisonFile).readlines())try: while 1: print diff.next(),except: passthe first character of each line indicates if they are different:eg.: '+' means the following line has been added, etc.