Get array peak values

peak.py

def solution(A):
    count = 0
    peaks = []
    for i in range(len(A)):
        if i > 0 and i != (len(A)-1) and A[i] > A[i-1] and A[i] > A[i+1] and A[i] not in peaks:
            peaks.append(A[i])
            count += 1
    return count


if __name__ == '__main__':
    assert solution([2, 2, 3, 2, 1]) == 1