[Tutor] how to get blank value

[Albert-Jan Roskam]

Mark Summerfield recently wrote a book called Programming in Python 3 (http://www.qtrac.eu/py3book.html) The chapter on regexes happens to be freely downloadable as a sample chapter:
http://ptgmedia.pearsoncmg.com/images/9780137129294/samplepages/0137129297_Sample.pdf

I found that chapter (in fact, the entire book!) very helpful. It's on Python 3, but that doesn't matter too much, esp. not in the regex chapter.

Cheers!!
Albert-Jan