Errata for Head First Programming

Address line is "http://www.beans-r-us.biz/prices.html" on page 39. IDLE Illustration on page 40 drops the "www." in the URL address. With the www in the address the results are different then the results in the Python Shell illustration on page 40. I think the code on page 39 should have the URL address = "http://beans-r-us.biz/prices.html" without the "www."

Note from the Author or Editor:
I've tried it both ways and it makes no difference. But, yes, the code in the illustration should match the code in the book. But, as I said, with or without the "www" prefix is working for me.

(Using an ePub, so I'm not sure the page number will help.) This typo is in the very first "There Are No Dumb Questions" segment in section 1. In the last line of the answer to the question, "There seems to be many different versions of Python. Which should I use?" the word "deciding" is misspelled "decidiing", with two 'i's.

Note from the Author or Editor:
Yes, this is a typo. Please change "decidiing" to "deciding" at the bottom of column 1 on page 9 (of the PDF/book).

"Goethe" instead of "Geothe"

Note from the Author or Editor:
Change "Geothe" to read "Goethe" under the second Head FIrst paragraph.

The bullet point reads: "Subtract the second index from the first to work out how long the substring should be." It should read: "Subtract the first index from the second to work out ...." As an example of the error: If the substring were, s[10:25], then subtracting the second index from the first would produce a substring with a negative length (in this case, -15)!

Note from the Author or Editor:
Yes, you are correct. We got the order wrong on page 49 ... thankfully it is OK on page 44. Thanks for this. --Paul.

"... more dynamic than ..." instead of "... more dynamic that ..."

Note from the Author or Editor:
Change "dynamic that" to "dynamic than".

"prgrammers" should be "programmers"

it's should be its.

"You were think about what would make the program easier to" should read You were thinking...

Note from the Author or Editor:
Should read "You were to think..." - this is an issue in the printed book, too.

"Be sure to put the function near the top of *you* file" should be "Be sure to put the function near the top of *your* file"

Explanatory comment about the Credit card length should point to the first "%16s" not the last which formats the Description.

Note from the Author or Editor:
Correct - the arrow is pointing to the wrong %16s.

The following error is one of inconsistency (but it's trivial). In chapter six the price of a latte is $2.0, until you get to p. 194. Beginning on p. 194, and for the rest of the chapter, the price of a latte is $2.20.

The braces for the comment have slipped sideways so instead of marking the price, they include the first digit of the credit card number.

Note from the Author or Editor:
Yes - they need to move to the left a little bit in two places (in both diagrams).

Near the end of the save_data() function, the following line appears twice: description.delete(0, END). It should appear once, only.

Note from the Author or Editor:
Yes, that's a typo. Only one of those statements is needed.

In my previous errata submission I pointed out the following typo: "Near the end of the save_data() function, the following line appears twice: description.delete(0, END). It should appear once, only." I have discovered that this typo is repeated in every occurrence of the "save_data()" function that appears in chapter eight. It occurs seven times.

Note from the Author or Editor:
Remove one of the duplicate lines.

the first answer was talking about typos and there was actually a typo. “As using the word “from” makes a lot of sense when taking about a scale” (probably should be talking). If that was intentional, you got me…

"checkoxes" should be "checkboxes"