return x[w] TypeError: list indices must be integers, not float

median

def median(some_list):
    x = sorted(some_list)
    if len(x)%2 == 0:
        q = len(x)/2
        t = x[q]
        u = x[(q-1)]
        v = (t+u)/2.0
        return v
    else:
        w = (len(x)/2)+.5
        return x[w-1]

print median([4,5,5,4,1])