Error in Django when using matplotlib examples
At the moment, matplotlib's writing functions require the seek ducktype to use the response at a file. You can write to a buffer, like this:
import iodef mplimage(request): f = matplotlib.figure.Figure() # Code that sets up figure goes here; in the question, that's ... FigureCanvasAgg(f) buf = io.BytesIO() plt.savefig(buf, format='png') plt.close(f) response = HttpResponse(buf.getvalue(), content_type='image/png') return response
You can just replace the response with a buffer and then add the buffer to the response. This will give an appropriate object to canvas.print_png() and keep code changes to a minimum.
def mplimage(request): f = matplotlib.figure.Figure() buf = io.BytesIO() canvas = FigureCanvasAgg(f) canvas.print_png(buf) response=HttpResponse(buf.getvalue(),content_type='image/png') # if required clear the figure for reuse f.clear() # I recommend to add Content-Length for Django response['Content-Length'] = str(len(response.content)) # return response