XV Paul Sleigh found an error in Chapter 7 and a bug in Jonah Cohen's Perl script that generates HTML from LaTeX. Craig T.Snydal is testing the text in a course at Drew University.He has contributed several valuable suggestions and corrections. Ian Thomas and his students are using the text in a programming course. They are the first ones to test the chapters in the latter half of the book, and they have made numerous corrections and suggestions. Keith Verheyden sent in a correction in Chapter 3. Peter Winstanley let us know about a longstanding error in our Latin in Chapter 3. Chris Wrobel made corrections to the code in the chapter on file I/O and exceptions Moshe Zadka has made invaluable contributions to this project.In addition to writing the first draft of the chapter on Dictionaries,he provided continual guidance in the early stages of the book Christoph Zwerschke sent several corrections and pedagogic suggestions,and explained the difference between gleich and selbe. James Mayer sent us a whole slew of spelling and typographical errors, including two in the contributor list Hayden McAfee caught a potentially confusing inconsistency between two examples. Angel Arnal is part of an international team of translators working on the Spanish version of the text.He has also found several errors in the English version. Tauhidul Hoque and Lex Berezhny created the illustrations in Chapter 1 and improved many of the other illustrations. Dr.Michele Alzetta caught an error in Chapter 8 and sent some interesting pedagogic comments and suggestions about Fibonacci and Old Maid. Andy Mitchell caught a typo in Chapter 1 and a broken example in Chapter 2. Kalin Harvey suggested a clarification in Chapter 7 and caught some typos. Christopher P.Smith caught several typos and is helping us prepare to update the book for Python 2.2.xv • Paul Sleigh found an error in Chapter 7 and a bug in Jonah Cohen’s Perl script that generates HTML from LaTeX. • Craig T. Snydal is testing the text in a course at Drew University. He has contributed several valuable suggestions and corrections. • Ian Thomas and his students are using the text in a programming course. They are the first ones to test the chapters in the latter half of the book, and they have made numerous corrections and suggestions. • Keith Verheyden sent in a correction in Chapter 3. • Peter Winstanley let us know about a longstanding error in our Latin in Chapter 3. • Chris Wrobel made corrections to the code in the chapter on file I/O and exceptions. • Moshe Zadka has made invaluable contributions to this project. In addition to writing the first draft of the chapter on Dictionaries, he provided continual guidance in the early stages of the book. • Christoph Zwerschke sent several corrections and pedagogic suggestions, and explained the difference between gleich and selbe. • James Mayer sent us a whole slew of spelling and typographical errors, including two in the contributor list. • Hayden McAfee caught a potentially confusing inconsistency between two examples. • Angel Arnal is part of an international team of translators working on the Spanish version of the text. He has also found several errors in the English version. • Tauhidul Hoque and Lex Berezhny created the illustrations in Chapter 1 and improved many of the other illustrations. • Dr. Michele Alzetta caught an error in Chapter 8 and sent some interesting pedagogic comments and suggestions about Fibonacci and Old Maid. • Andy Mitchell caught a typo in Chapter 1 and a broken example in Chapter 2. • Kalin Harvey suggested a clarification in Chapter 7 and caught some typos. • Christopher P. Smith caught several typos and is helping us prepare to update the book for Python 2.2