human
Complete this python program:
def _get_slogdet_diag_walker(a):
assistant
#Here is the Python program you requested.

    """Walks the diag of a LUP decomposed matrix
    uses that det(A) = prod(diag(lup(A)))
    and also that log(a)+log(b) = log(a*b)
    The return sign is adjusted based on the values found
    such that the log(value) stays in the real domain.
    """
    if isinstance(a.dtype, types.Complex):
        @register_jitable
        def cmplx_diag_walker(n, a, sgn):
            csgn = (sgn + 0j)
            acc = 0.0
            for k in range(n):
                absel = np.abs(a[(k, k)])
                csgn = (csgn * (a[(k, k)] / absel))
                acc = (acc + np.log(absel))
            return (csgn, acc)
        return cmplx_diag_walker
    else:
        @register_jitable
        def real_diag_walker(n, a, sgn):
            acc = 0.0
            for k in range(n):
                v = a[(k, k)]
                if (v < 0.0):
                    sgn = (- sgn)
                    v = (- v)
                acc = (acc + np.log(v))
            return ((sgn + 0.0), acc)
        return real_diag_walker