Filter rlw repository data

def rlw_filter(name, location, size, unsize):
    """Filter rlw repository data
    """
    arch = _meta_.arch
    if arch.startswith("i") and arch.endswith("86"):
        arch = "i486"
    (fname, flocation, fsize, funsize) = ([] for i in range(4))
    for n, l, s, u in zip(name, location, size, unsize):
        loc = l.split("/")
        if arch == loc[-1]:
            fname.append(n)
            flocation.append(l)
            fsize.append(s)
            funsize.append(u)
    return [fname, flocation, fsize, funsize]