[CentralOH] Advanced Python Book Recommendations

[Mark Erbaugh]

What are people's recommendations for advanced Python texts?  Most of the books I have or have looked at seem to spend a fair amount of ink introducing the basics. Are there any books geared to experienced Python programmers (or all of the people who really KNOW Python busy writing code and not books)?  Is there a book that you find indispensable when coding in Python? 

Thanks,
Mark