Conventions used

There are a number of text conventions used throughout this book.

Code in text: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: “We compute the correlation matrix of this dataset using the corr() method.”

A block of code is set as follows:

# Compute and show correlation matrix
corr_mat = df.corr()
plt.matshow(corr_mat)
plt.show()

Any command-line input or output is written as follows:

$ mkdir css
$ cd css

Bold: Indicates a new term, an important word, or words that you see onscreen. For instance, words in menus or dialog boxes appear in bold. Here is an example: “If you click on the View as Array link, which can also be activated by right-clicking the variable, you can see a spreadsheet-like table in the Data panel.”

Tips or important notes

Appear like this.