[Goladus]

Intro material, even if it's not too verbose, may omit important details anway. For example, a regex tutorial might only give a brief, vague explanation of raw strings (maybe a quick comment about not needing to escape backslashes, etc.). Eventually you'll want to read the more comprehensive reference on string literals, to make sure you haven't missed anything. (In the case of raw strings, unicode characters are still escaped and you can't end one with an odd number of backslashes.)

http://docs.python.org/reference/lexical_analysis.html#strin...