It's funny...most bloods you see these days are actually of Sumatran descent. From time to time you'll see them labeled for sale as "Malaysians," but the people who can also provide legit proof of locale data on such snakes are few and far between. Malaysians haven't been imported with regularity for well over a quarter-century now, and the vast majority of bloods that have been available in the herp trade in the past 10-15 years descended from Sumatran stock.
Just a little tidbit on blood python history.
K~