get indexies of local maximum values

gistfile1.py

#!/usr/bin/python

sample = [10, 11, 12, 1, 2, 3, 4, 2, 3]
temp = [0] + sample[0:-1]

points = map(lambda (x, y): x - 1,
            filter(lambda (i, v): v < 0,
                enumerate(map(lambda (a, b): a - b, zip(sample, temp)))))

if points[-1] != len(sample) - 1:
    points += [len(sample) - 1]

s = 0
for point in points:
    s += sample[point]

print s