Norman> So, what am I missing below as both searches "should" succeed? "r". >>> import re >>> re.search("(.+) \1", '55 55') >>> re.search(r"(.+) \1", '55 55') <_sre.SRE_Match object at 0x402665a0> <wink> -- Skip Montanaro skip at pobox.com consulting: http://manatee.mojam.com/~skip/resume.html