I have lists of dictionary. Let's say it
total = [{"date": "2014-03-01", "value": 200}, {"date": "2014-03-02", "value": 100}{"date": "2014-03-03", "value": 400}]
I need get maximum, minimum, average value from it. I can get max and min values with below code:
print min(d['value'] for d in total)
print max(d['value'] for d in total)
But now I need get average value from it. How to do it?
Just divide the sum of values by the length of the list:
print(sum(d['value'] for d in total) / len(total))
Note that division of integers returns the integer value. This means that average of the [5, 5, 0, 0] will be 2 instead of 2.5. If you need more precise result then you can use the float() value:
print(float(sum(d['value'] for d in total)) / len(total))