Errata
The errata list is a list of errors and their corrections that were found after the product was released. If the error was corrected in a later version or reprint the date of the correction will be displayed in the column titled "Date Corrected".
The following errata were submitted by our customers and approved as valid errors by the author or editor.
Color key: Serious technical mistake Minor technical mistake Language or formatting error Typo Question Note Update
Version | Location | Description | Submitted By | Date submitted | Date corrected |
---|---|---|---|---|---|
Page na na |
Figure 13-2 -> should be “0248…ac - witness” Figure 13-21 -> should be “0400…ae - witness” Figure 13-26 -> please consider listing the two signatures for clarity since "<signaturex>" is not defined Figure 13-27 -> should be “026c…f3 - <pubkeyx>” and please consider listing all three pubkeys for clarity since "<pubkeyx>" is not defined Figure 13-42 -> please consider listing the two signatures for clarity since "<signaturex>" is not defined Figure 13-43 -> should be “026c…f3 - <pubkeyx>” and please consider listing all three pubkeys for clarity since "<pubkeyx>" is not defined Note from the Author or Editor: |
Casey Bowman | Feb 13, 2019 | May 03, 2019 | |
Page xv bottom of the page |
Printed is : --- 6. Install virtualenv: $ pip install virtualenv --- The problem is that there is a distintion into different user accounts on Linux. This command only runs like this if you are working with the root account, which you should not do. The easy fix is to modify the last line to read : $ pip install virtualenv --user This will install into the user home directory instead of systemwide, which would require root access. Note from the Author or Editor: |
Lutz Lange | Feb 27, 2019 | May 03, 2019 | |
Printed | Page 36 Deriving the Point Addition Formula |
From earlier, we know that: x^3 - s^2x^2 + (a + 2s^2x_1 -2sy~1~)x + b - s^2x_1^2 + 2sx~1~y_1-y_1^2 = 0 => x^3 - s^2x^2 + (a + 2s^2x_1 -2sy_1)x + b - s^2x_1^2 + 2sx_1y_1-y_1^2 = 0 (tilde => subscript) Note from the Author or Editor: |
kamimura | Mar 31, 2019 | May 03, 2019 |
Page 123 Figure 6-22 |
The text of the bottom left label needs to be changed: from: OP_CHECKMULTISIG to: OP_CHECKSIG |
O'Reilly Media, Inc. |
Apr 22, 2019 | May 03, 2019 | |
Page 179 Figure 10-2 |
Hexdump of both receiver and sender's network port should read "208d" instead of "8d20" Note from the Author or Editor: |
Simon Castano | Mar 15, 2019 | May 03, 2019 | |
Page 180 2nd paragraph |
Last line should read "which maps to 208d in big-endian hex." instead of "which maps to 8d20 in little-endian hex" Note from the Author or Editor: |
Simon Castano | Mar 15, 2019 | May 03, 2019 | |
Printed | Page 255-256 3rd line from the bottom on p 255 & 3rd line from the top on p 256 |
The 3rd line from the bottom of p 255 should read: >>> a, x1, y1 = 5, -1, -1 and the 3rd line from the top of p 256 should read: 10.0 77.0 Also in the code for Exercise 6 in Chapter 2, three files related to this error need to be changed. 1) code-ch02/answers.py line 48: a, x1, y1 = 5, -1, -1 line 53: 18.0 77.0 2) code-ch02/jupiter.txt line 35: x1, y1, = -1, -1 line 36: # (-1,-1) + (-1,-1) 3) code-ch02/Chapter2.ipynb line 171: "For the curve \\\\(y^{2}\\\\)=\\\\(x^{3}\\\\)+5x=7, what is (-1,-1) + (-1,-1)?" line 186: "x1, y1 = -1, -1\n", line 187: "# (-1,-1) + (-1,-1)" Note from the Author or Editor: |
Casey Bowman | Mar 08, 2019 | May 03, 2019 |