Tumbling Window Aggregate

Problem

Aggregate a stream into tumbling windows.

sizes is the sequence of values and window is the number of items per window; the final window may be partial.

Return the list of window sums.

Hint

Windows never overlap, so slice the input in strides.

case 1

in: [[1,2,3,4,5],2]

expected: [3,7,5]

case 2

in: [[],2]

expected: []

case 3

in: [[1],3]

expected: [1]

case 4

in: [[1,2,3,4],4]

expected: [10]

Starter codePython

def tumbling_window(sizes, window):
    # Your code here
    pass

4 test cases · run your code against them in the editor