Created
June 4, 2018 20:23
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Flask Graph Generation
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from flask import Flask, make_response | |
app = Flask(__name__) | |
@app.route("/simple.png") | |
def simple(): | |
import datetime | |
from io import BytesIO | |
import random | |
from matplotlib.backends.backend_agg import FigureCanvasAgg as FigureCanvas | |
from matplotlib.figure import Figure | |
from matplotlib.dates import DateFormatter | |
fig=Figure() | |
ax=fig.add_subplot(111) | |
x=[] | |
y=[] | |
now=datetime.datetime.now() | |
delta=datetime.timedelta(days=1) | |
for i in range(10): | |
x.append(now) | |
now+=delta | |
y.append(random.randint(0, 1000)) | |
ax.plot_date(x, y, '-') | |
ax.xaxis.set_major_formatter(DateFormatter('%Y-%m-%d')) | |
fig.autofmt_xdate() | |
canvas=FigureCanvas(fig) | |
png_output = BytesIO() | |
canvas.print_png(png_output) | |
response=make_response(png_output.getvalue()) | |
response.headers['Content-Type'] = 'image/png' | |
return response | |
if __name__ == "__main__": | |
app.run() |
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