For a reticulated python, that one wasn’t especially large. Wikipedia:
“The reticulated python is the largest snake native to Asia. More than a thousand wild reticulated pythons in southern Sumatra were studied, and estimated to have a length range of 1.5 to 6.5 m (4.9 to 21.3 ft)...”
Not that I’m planning on being around large constrictors, but I’ve been checking the net for suggestions if attacked by one. Here’s some advice from https://www.thailandsnakes.com/how-survive-python-attack/
“How To Survive a Big Python Bite and Full-on Attack
1. Python bites you.
2. Pull out a knife as fast as possible. The knife should have a lanyard to wrap around your wrist so you can do #3.
3. Keep the python from wrapping around you at all costs.
4. When possible – stab the snake in the side or belly repeatedly and many different places. Don’t stop. Stop when the snake lets go and you can run away as fast as you can.
5. Hope the snake lets go.”
That advice didn’t impress me much. Seems to me it would be almost impossible to keep a large one from wrapping around part of you, but maybe one arm would be free. More advice was added later, though. It was suggested that a small saw might work best. Sawing behind the head would kill it almost immediately, and sawing other parts might discourage it or weaken that part. A pistol might come in handy too, if you can shoot it without hitting yourself. (Of course, you have to hope a large one doesn’t manage to wrap around both arms immediately, else you might have no chance to use any of the suggestions.)
Best just to stay away from them.