error :list indices must be integers, not float for median

Question

Trying to find median but keep getting list indices must be integers, not float error and am not sure what to do.

sorted_data = sorted(data, key=lambda d:d.a         


        

Answer 1

The statistics module is part of the standard library:

import statistics

data = [1, 2, 3, 4]
statistics.median(data)