x:x-axis data (list-like, optional, defaults to 0,1,2...)
y: y-axis data (required)
marker: point style (e.g., '.', 'o', 's', '+', '*', 'x')
color: line color (e.g., 'r', 'g', 'b', 'c', 'm', 'y', 'k', 'w')
linestyle: line style (e.g., '-', '--', '-.', ':', 'None')
Pie chart with percentages