How to convert the datetime.date to Date.UTC using python

Question

I'm using highchart to create chart, the chart take this as argument and to see the full tuple is here: highcharts jsonp

?([
[Date.UTC(2013,5,2),0.7695],
[Date.UTC(2013,5,3),0.7648],
[Date.UTC(2013,5,4),0.7645],
[Date.UTC(2015,5,24),0.8924],
[Date.UTC(2015,5,25),0.8925],
[Date.UTC(2015,5,26),0.8955],
[Date.UTC(2015,5,28),0.9113],
[Date.UTC(2015,5,29),0.8900],
[Date.UTC(2015,5,30),0.8950]
]);

From my PostgreSQL database using python I get this result.

([
[datetime.date(2016, 5, 9), 345], 
[datetime.date(2016, 5, 8), 453], 
[datetime.date(2016, 5, 7), 467], 
[datetime.date(2016, 5, 6), 938], 
[datetime.date(2016, 5, 5), 393], 
[datetime.date(2016, 5, 4), 498], 
[datetime.date(2016, 5, 3), 334], 
[datetime.date(2016, 5, 2), 849]
])

How to format the results to match the the highcharts argument by converting the datetime.date to Date.UTC

Answer 1

You should calculate javascript timestamps (time in milliseconds since 01.01.1970) in Python from the dates - server-side.

or

send only dates (eg as strings) and parse it into required JS timestamps in JS - client-side.

Do not send functions - send string (date) or a number (timestamp).