Donut chart in pygal
Pygal is a Python module that is mainly used to build SVG (Scalar Vector Graphics) graphs and charts. SVG is a vector-based graphics in the XML format that can be edited in any editor. Pygal can create graphs with minimal lines of code that can be easy to understand.
A donut pie chart essential a pie chart which has a hole in the center of the pie which makes the difference between the pie and the donut pie. This can be created using the Pie() method of the pygal module passing the parameter inner radius. The inner radius parameter should be set to a number between 0 and 1, commensurate to the ratio of radii between the hole and the chart.
pie_chart = pygal.Pie(inner_radius=.4)
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