CODEWITHSUNDEEP
pythondjangomatplotlib
Mervyn Lee
Mervyn Lee

Reputation: 2187

Return image in HTTP response

After compute the scatter plot with

plt.scatter(...)

I can preview the graph with

plt.show()

However, I wish to save the plot with some sort of function like savefig() which store the image in a variable instead of a file, then return the variable in http response as content/png in django web framework

Upvotes: 2

Views: 6139

Answers (4)

Igor Pejic
Igor Pejic

Reputation: 3698

You can return the plot as a png image like this:

from matplotlib.backends.backend_agg import FigureCanvasAgg
from matplotlib.figure import Figure
from django.http import HttpResponse

def graph(request):
    fig = Figure()

    # draw your plot here ......
    ax = fig.add_subplot(111)
    # .............

    canvas = FigureCanvasAgg(fig)
    response = HttpResponse(content_type = 'image/png')
    canvas.print_png(response)
    return response

But, since matplotlib 2.2.0 print_png function doesn't take HttpResponse anymore.

Upvotes: 1

Mervyn Lee
Mervyn Lee

Reputation: 2187

After further searching, I found Returning MatPotLib image as string

This solution solved my problem. Thank you everyone for the help.

Upvotes: 1

Ofer Sadan
Ofer Sadan

Reputation: 11942

I suggest you use mpld3 that is designed for that, here's a guide

Specifically, have a look at mpld3.fig_to_html()

Upvotes: 0

Rahul
Rahul

Reputation: 11560

use

plt.savefig(save_file)

read more at: http://matplotlib.org/api/pyplot_api.html#matplotlib.pyplot.savefig

Upvotes: 0

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