Learn Python by Building Data Science Applications

Pre-flight check

Before we proceed to the content of this book, let's ensure our code can actually be executed by running the simplest possible code in Jupyter. To do this, let's create a test notebook and run some code to ensure everything works as intended. Click on the Python 3 square in the Notebook section. A new tab should open, called Untitled.ipynb. 

First, the blue line highlighted represents the selected cell in the notebook. Each cell represents a separate snippet of code, which is executed simultaneously in one step. Let's write our very first line of code in this cell:

print('Hello world')

Now, hit Shift + Enter. This shortcut executes the selected cells in Python and outputs the result on the next line. It also automatically ...