Matplotlib can be used to output graphics directly from a controller, by writing to an intermediate StringIO object.
For example:
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25 | import logging
from plottest.lib.base import *
import matplotlib
matplotlib.use('Agg')
from matplotlib.backends.backend_agg import FigureCanvasAgg as FigureCanvas
from matplotlib.figure import Figure
from cStringIO import StringIO
log = logging.getLogger(__name__)
class PlotController(BaseController):
def index(self):
fig = Figure()
canvas = FigureCanvas(fig)
ax = fig.add_subplot(111)
ax.plot([1, 4, 2, 3])
s = StringIO()
canvas.print_figure(s)
response.headers['Content-Type'] = 'image/png'
return s.getvalue()
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