Functional Programming

[beno]

Hi;
I've just completed *XSLT Programmer's Reference* (an excellent book on the 
subject). For those familiar with this language, it relies on functional 
programming. The concept was new to me but appeals to me. I would like to 
practice functional programming in Python. I went to Amazon to look for 
books on the same and was disappointed none are written for Python; rather, 
almost all are written for Haskell. Does anyone know of good sources of 
info for programming using the principles of functional programming in 
Python? Or, to what languages is Haskell similar? Any other advice on the 
subject equally welcomed!
TIA,
beno