The Bokeh ColumnDataSource (continued)

You can create a ColumnDataSource object directly from a Pandas DataFrame by passing the DataFrame to the class initializer.

In this exercise, we have imported pandas as pd and read in a data set containing all Olympic medals awarded in the 100 meter sprint from 1896 to 2012. A color column has been added indicating the CSS colorname we wish to use in the plot for every data point.

Your job is to import the ColumnDataSource class, create a new ColumnDataSource object from the DataFrame df, and plot circle glyphs with 'Year' on the x-axis and 'Time' on the y-axis. Color each glyph by the color column.

The figure object p has already been created for you.

Instructions

Import the ColumnDataSource class from bokeh.plotting.
Use the ColumnDataSource() function to make a new ColumnDataSource object called source from the DataFrame df.
Use p.circle() to plot circle glyphs of size=8 on the figure p with 'Year' on the x-axis and 'Time' on the y-axis. Be sure to also specify source=source and color='color' so that the ColumnDataSource object is used and each glyph is colored by the color column.

Take Hint (-30xp)