Not a kata issue!

• Your code assumes all odd integers are primes, which is wrong

• Your code returns [] for 2 which is a prime itsdelf

Please read this:

• https://docs.codewars.com/training/troubleshooting#print-input
• https://docs.codewars.com/training/troubleshooting#post-discourse

Your code fails with tests like this one:

test.assert_equals(pick_peaks([0, 3, 3, 19, 0, 17, -3]), {'pos': [3, 5], 'peaks': [19, 17]})

It returns {'pos': [1, 3, 5], 'peaks': [3, 19, 17]} instead. 3 at position 1 is not a plateau peak, 19 at position 3 is higher.

Not a kata issue, use Questionlabel next time.