IPython Magic Functions

Both Python for Data Science for Dummies and Machine Learning for Dummies rely on a version of Anaconda that uses IPython as part of its offering.Theoretically, you could also use Anaconda with Beginning Programming with Python For Dummies, but that book is designed to provide you with an experience that relies on the strict Python offerings (without the use of external tools). In other words, the procedures in this third book are designed for use with IDLE, the IDE that comes with Python. IPython extends the development environment in a number of ways, one of which is the use of magic functions. You see the magic functions in the code of the first two books as calls that begin with either one or two percent signs (% or %%). The most common of these magic functions is %matplotlib, which controls how IPython Notebook or Jupyter Notebook display plot output from the code.

You can find a listing of the most common magic functions in the Python for Data Science for Dummies Cheat Sheet. Neither of the first two books use any other magic functions, so this is also a complete list of magic functions that you can expect to find in our books. However, you might want to know more. Fortunately, the site at https://damontallen.github.io/IPython-quick-ref-sheets/ provides you with a complete listing of the magic commands (and a wealth of other information about IPython).

Of course, you might choose to use another IDE—one that isn’t quite so magical as Anaconda provides through IPython. In this case, you need to remove those magic commands. Removing the commands won’t affect functionality of the code. The example will still work as explained in the book. However, the way that the IDE presents output could change. For example, instead of being inline, plots could appear in a separate window. Even though using a separate window is less convenient, either method works just fine. If you ever do encounter a magic function-related problem, please be sure to let me know at John@JohnMuellerBooks.com.

 

Using Jupyter with Anaconda (Updated)

A few readers have recently written to me regarding the use of Jupyter with the downloadable source for Python for Data Science for Dummies. The version of Anaconda recommended for the book, 2.1.0, doesn’t rely on Jupyter, which is why the book doesn’t mention Jupyter. The book relies on IPython Notebook, which is what you should use to obtain the best reading experience. You can obtain the proper version from the Continuum archive. However, if you choose to download the current version of Anaconda, then using Jupyter becomes a possibility; although, many of the procedures found in the book will require tweaking and the screenshots won’t match precisely.

In order to use Jupyter, you must still import the downloaded files into your repository. The source code comes in an archive file that you extract to a location on your hard drive. The archive contains a list of .ipynb (IPython Notebook) files containing the source code for this book (see the Introduction for details on downloading the source code). The following steps tell how to import these files into your repository:

  1. Click Upload at the top of the page. What you see depends on your browser. In most cases, you see some type of File Upload dialog box that provides access to the files on your hard drive.
  2. Navigate to the directory containing the files you want to import into Notebook.
  3. Highlight one or more files to import and click the Open (or other, similar) button to begin the upload process. You see the file added to an upload list, as shown here. The file isn’t part of the repository yet—you’ve simply selected it for upload.

    Click Upload when you want to upload files to the repository.
    Upload Source Files to the Repository
  4. Click Upload. Notebook places the file in the repository so that you can begin using it.

It’s important to both Luca and me that you have the best possible learning experience with our book. This means using the right version of Anaconda for most people. Using the latest version shouldn’t cause problems, but we’d like to know if it does. Please feel free contact me at John@JohnMuellerBooks.com with your book-specific questions.


Update

It has come to our attention since this post first published that using the latest version of Anaconda with Python for Data Science for Dummies is problematic. Some of the examples won’t work without rewriting because the Pandas Categorical class has changed. This is the only change we’ve confirmed so far, but there are no doubt other changes. In order to get the proper results from the examples in the book, you must use the correct version of Anaconda, version 2.1.0.

Please do keep those questions coming. It’s because a reader took time to write that Luca and I became aware of this problem. We truly do want you to have a great learning experience, so these questions are important!