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POPassing string with (accidental) escape character loses character even though it's a raw string
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  1. POPassing string with (accidental) escape character loses character even though it's a raw string
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    copied!<p>I have a function with a python doctest that fails because one of the test input strings has a backslash that's treated like an escape character even though I've encoded the string as a raw string. </p> <p>My doctest looks like this:</p> <pre><code>&gt;&gt;&gt; infile = [ "Todo: fix me", "/** todo: fix", "* me", "*/", r"""//\todo stuff to fix""", "TODO fix me too", "toDo bug 4663" ] &gt;&gt;&gt; find_todos( infile ) ['fix me', 'fix', 'stuff to fix', 'fix me too', 'bug 4663'] </code></pre> <p>And the function, which is intended to extract the todo texts from a single line following some variation over a todo specification, looks like this:</p> <pre><code>todos = list() for line in infile: print line if todo_match_obj.search( line ): todos.append( todo_match_obj.search( line ).group( 'todo' ) ) </code></pre> <p>And the regular expression called <code>todo_match_obj</code> is:</p> <pre><code>r"""(?:/{0,2}\**\s?todo):?\s*(?P&lt;todo&gt;.+)""" </code></pre> <p>A quick conversation with my ipython shell gives me:</p> <pre><code>In [35]: print "//\todo" // odo In [36]: print r"""//\todo""" //\todo </code></pre> <p>And, just in case the doctest implementation uses stdout (I haven't checked, sorry):</p> <pre><code>In [37]: sys.stdout.write( r"""//\todo""" ) //\todo </code></pre> <p>My regex-foo is not high by any standards, and I realize that I could be missing something here.</p> <p>EDIT: Following Alex Martellis answer, I would like suggestions on what regular expression <em>would</em> actually match the blasted <code>r"""//\todo fix me"""</code>. I know that I did not originally ask for someone to do my homework, and I will accept Alex's answer as it really did answer my question (or confirm my fears). But I promise to upvote any good solutions to my problem here :)</p> <p>EDITEDIT: for reference, a bug has been filed with the kodos project: <a href="https://sourceforge.net/tracker/?func=detail&amp;aid=2982286&amp;group_id=43860&amp;atid=437633" rel="nofollow noreferrer">bug #437633</a></p> <p>I'm using Python 2.6.4 (r264:75706, Dec 7 2009, 18:45:15)</p> <p>Thank you for reading this far (If you skipped directly down here, I understand)</p>
 

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