It has to be easier to get a dead python into your truck than a live one, right?
Garret Galvin @fishingarrett has made a name for himself yoinking all sorts of critters in the wild but in particular seems to be targeting invasive pythons in the Everglades. He's very entertaining if you like nature stuff, he's like Steve Irwin's spiritual successor.
Then you ignore the noise factor which can scare off other pythons in the area.
You have to make the carrier a mundane part of the cat's life. Leave it out randomly so the cat isn't associating it with unpleasantness, put snacks in it. Then it won't be an object that brings fear and anger.