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What you are looking for is the json module. You can simply arrange your data in the correct form in python and write to a JSON that Chart.js can understand.
import json
data = {'label' : labels, 'datasets' : dataset}
with open('data.json', 'w') as f:
json.dump(data, f)
This question is about how to get your JSON into Chart.js.
Source:stackexchange.com