Chartography.net

    
from GChartWrapper import *
# Using text markers in a bar chart
G = HorizontalBarGroup([[40,60],[50,30]], encoding='text')
G.size(200,125)
G.marker('tApril mobile hits','black',0,0,13)
G.marker('tMay mobile hits','black',0,1,13,-1)
G.marker('tApril desktop hits','black',1,0,13)
G.marker('tMay desktop hits', 'black',1,1,13)
G.color('FF9900','FFCC33')