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: "There is no predict_many function here, so it is necessary to do a loop with predict_one repeatedly."

A block of code is set as follows:

def self_made_decision_tree(observation): 

    if observation.can_speak: 

        if not observation.has_feathers: 

            return 'human'     

    return 'not human'  

for i,row in data.iterrows(): 

    print(self_made_decision_tree(row)) 

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

from sklearn.datasets import make_blobs 

X,y=make_blobs(shuffle=True,centers=2,n_samples=2000) 

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: "Select System info from the Administration panel."

Tips or important notes

Appear like this.