The downloadable source for Python for Data Science for Dummies contains a problem that doesn’t actually appear in the book. If you look at page 221, the code block in the middle of the page contains a line saying import numpy as np. This line is essential because the code won’t run without it. The downloadable source for Chapter 12 is missing this line so the example doesn’t run. This P4DS4D; 12; Stretching Pythons Capabilities link provides you with a .ZIP file that contains the replacement source code. Simple remove the P4DS4D; 12; Stretching Pythons Capabilities.ipynb file from the archive and use it in place of your existing file.
Luca and I always want you to have a great experience with our book, so keep those emails coming. Please let me know if you have any questions about source code file update at John@JohnMuellerBooks.com. I’m sorry about any errors that appear in the downloadable source and appreciate the readers who have pointed them out.