I've been programming in Perl for years - over ten now in fact - and I've written numerous books and articles on Perl and Perl programming. I've also worked with Python and written books and articles on Python programming, including a guide to migrating Perl applications to the Python language. For a while I really saw Python as an alternative to Perl, but after so many years and experience with Perl and what was possible with the language it is difficult to move on from the 'Perl comfort zone'.