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• ‘games_played’ extracts the column named ‘Games Played’ from the DataFrame, creating a series that contains the
                   number of games played.
                   • ‘total_scores’ extracts the column named ‘Total Scores’ from the DataFrame, creating a series that contains the total scores.
                    • These extracted series (games_played and total_scores) are then used to create a scatter plot.


                 Pie Chart
                 A pie chart is a circular graph divided into slices to show the relative proportions of different categories within a
                 whole. Each slice's size is proportional to the quantity it represents. Pie charts are mostly used to visualise facts from
                 a small dataset. There should be not more than seven categories in a pie chart. Another limitation of a Pie chart is
                 that zero values can't be displayed in pie chart. However, these graphs are hard to interpret and compare facts with
                 another pie chart.
                 Pie charts are used to examine elements of a whole. They do not display changes over time. For example, pie charts
                 may be used to suggest the achievement or failure of a product or service, display the time-period allotted to each
                 subject in a class, or depict monthly spending on numerous items and services in a household. For example:

                                                                                  No. of books read in a month
                          Story books      No. of books read in a month
                                                                                  Self-help books
                                                                                    12%
                          Fiction                       30
                                                                                             Fiction     Fiction
                                                                                             35%
                          Murder Mystery                20                                               Murder Mystery
                                                                                Comic Books
                                                                                 29%                     Comic Books
                          Comic Books                   25                                               Self-help books
                                                                                      Murder Mystery
                                                                                         24%
                          Self-help books               10


                 The function pie() is used to plot a pie chart.
                   Program 10: Create a Pie chart for different category of books read in a month using Python.


                        Book Category             Fiction      Murder Mystery      Comic Books     Self-help books
                        Read in a Month             30               20                25                10





                 import matplotlib.pyplot as plt

                 # Data
                 labels = ['Fiction', 'Murder Mystery', 'Comic Books', 'Self-help books']
                 sizes = [30, 20, 25, 10]
                 colors = ['gold', 'yellowgreen', 'lightcoral', 'lightskyblue']
                 explode = (0.1, 0, 0, 0)  # explode the first slice (Fiction)


                 # Create pie chart using pie() function.
                 plt.pie(sizes, explode=explode, labels=labels, colors=colors,
                         autopct='%1.0f%%', shadow=True, startangle=140)

                 # Add title
                 plt.title('No. of Books Read in a Month')

                                                                   Data Literacy—Data Collection to Data Analysis  301
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