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    <blockquote> <p>... but this doesn't handle "mixed" text-files of utterly confused conventions (Yes, they still exist!)</p> </blockquote> <p>Actually it should work fine:</p> <pre><code>&gt;&gt;&gt; s = 'hello world\nline 1\r\nline 2' &gt;&gt;&gt; s.splitlines() ['hello world', 'line 1', 'line 2'] &gt;&gt;&gt; '\n'.join(s.splitlines()) 'hello world\nline 1\nline 2' </code></pre> <p>What version of Python are you using?</p> <p><strong>EDIT:</strong> I still don't see how <code>splitlines()</code> is not working for you:</p> <pre><code>&gt;&gt;&gt; s = '''\ ... First line, with LF\n\ ... Second line, with CR\r\ ... Third line, with CRLF\r\n\ ... Two blank lines with LFs\n\ ... \n\ ... \n\ ... Two blank lines with CRs\r\ ... \r\ ... \r\ ... Two blank lines with CRLFs\r\n\ ... \r\n\ ... \r\n\ ... Three blank lines with a jumble of things:\r\n\ ... \r\ ... \r\n\ ... \n\ ... End without a newline.''' &gt;&gt;&gt; s.splitlines() ['First line, with LF', 'Second line, with CR', 'Third line, with CRLF', 'Two blank lines with LFs', '', '', 'Two blank lines with CRs', '', '', 'Two blank lines with CRLFs', '', '', 'Three blank lines with a jumble of things:', '', '', '', 'End without a newline.'] &gt;&gt;&gt; print '\n'.join(s.splitlines()) First line, with LF Second line, with CR Third line, with CRLF Two blank lines with LFs Two blank lines with CRs Two blank lines with CRLFs Three blank lines with a jumble of things: End without a newline. </code></pre> <p>As far as I know <code>splitlines()</code> doesn't split the list twice or anything.</p> <p>Can you paste a sample of the kind of input that's giving you trouble?</p>
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    1. POWhat's the most pythonic way of normalizing lineends in a string?
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    1. USSteve Losh
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    1. COI've edited my question. This (mixed convention) broke a test-case today :) ah, the assumptions we make... I'm hoping to avoid an O(n^2)-situation with a double split.
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    2. CO+1 This looks perfect! @kaleissin Are you saying that splitlines() does not split at *all possible* line breaks (whatever the convention)? I'd be surprised…
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      1. USEric Lebigot
    3. COlen("a\nb\n\nc\nd".splitlines()) == 5 len("a\rb\r\nc\nd".splitlines()) == 4 This is python 2.6.2. Basically, when it's mixed, I'm not making the assumption that '\r\n' or '\n\r' should be considered a single logical newline.
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