Average Absolute Deviation

def aad(lst):
    """
        return the average absolute deviation of the list
    """
    temp = []
    mean = sum(lst) / float(len(lst))
    for i in range(len(lst)):
        temp.append(float(abs(lst[i] - mean)))
    return sum(temp) / len(lst)

b = [6, 15, 26, 15, 18, 23, 19, 32, 28, 44]

print aad(b)