Dear friends, I don't understand the need to think that the man was already dead and eaten by the python as a carrion.
The combination of two extremely rare events (a man who dies in the forest - why? killed by a cobra bite? killed by his jealous wife? killed by a heatstroke? + a huge retic which finds the dead body and eats it) is surely not more probable than a single very rare event (a small man killed and eaten by a huge retic). At least if we apply the Occam's razor way of thinking...
Retics are shy to attack humans?
My german friends keep many retics in one huge terrarium, and one of this retics is so bad tempered that tries to attack, kill and eat every living creature which is present near him: my friends must keep this snake away with a large broom, and sometimes this animal tries to "kill" (= constrict) and eat even the broom! Not all the snakes of a same species are the same...
If we don't know any other detail of the story, the most probable and logical way of thinking is that the man was killed and eaten by the snake, exactly as if the man's body would have been found inside the stomach of a bear, a shark or a crocodile...