revisi tugas matriks

a = raw_input("Masukkan Nilai a dan b : ")
a = int(a)
b = int(b)
c = 0
d = 0
isi = 1
baris = 0
kolom = 0
kondisi = 1
tes = []

    while d<c:
        if kondisi == 1:
            while c<d:
                tes[d][c] =isi
                d=d+1
                isi = isi + 1
            else:
                kondisi = 0
                d = d - 1
                c = c + 1
        else:
            while d>=0:
                tes[d][c] = isi
                d=d-1
                isi = isi + 1
            else
                kondisi = 1
                d = d + 1
                c = c + 1

    while baris < a:
            while kolom < b:
                print tes[baris][kolom]
                kolom = kolom + 1
            else:
                print (" Masukkan ")
                baris = baris + 1
                kolom = 0