quickchartio_to_png.py

# from 
# https://quickchart.io/documentation/send-charts-in-email/#render-the-chart-image
# https://stackoverflow.com/questions/13137817/how-to-download-image-using-requests
# 
# see also
# https://www.chartjs.org/docs/2.9.4/charts/doughnut.html

import shutil

import requests

churl = "https://quickchart.io/chart?c={type:'bar',data:{labels:[2012,2013,2014,2015,2016],datasets:[{label:'Users',data:[120,60,50,180,120]}]}}"
r = requests.get(churl, stream=True)

assert r.status_code == 200, f"chart failed: {r.status_code}"

with ("test.png", "wb") as f:
    r.raw.decode_content = True
    shutil.copyfileobj(r.raw, f)