Conventions

In this book, you will find a number of styles of text that distinguish between different kinds of information. Here are some examples of these styles, and an explanation of their meaning.

A typical code snippet would look as follows:

def closest_station(lat, longi):
    stations = np.array([[41.995, -87.933],
                         [41.786, -87.752]])
    loc = np.array([lat, longi])
    deltas = stations - loc[None, :]
    dist2 = (deltas**2).sum(1)
    return np.argmin(dist2)

The outputs of the code snippets are generally shown as the screenshots. This is how a screenshot looks:

New terms and important words are shown in bold. Words that you see on the screen, for example, in menus or dialog boxes, appear in the text like this: "The plot of Monthly Income and Monthly Expense for a group of 400 people."

Note

Warnings or important notes appear in a box like this.

Tip

Tips and tricks appear like this.

URLs are shown as below:

https://pypi.python.org/pypi/pip

A lot of tables have been used to summarize the results of mathematical discussions and illustrate certain concepts.