Snakes are more capable of learning than most people give them credit for. Herpo, your routine is a classic example of operant conditioning. Your snake is going into feeding mode without the usually required stimuli of sighting or smelling tucker, because it has learned to associate being weighed with being fed. Just like Pavlov’s dog. Shunco, establishing one routine when feeding and a different one when taking the snake out, will allow it to learn to recognise what is about to happen. Something as simple as which side of the enclosure you stick your hand in can make a difference. The important thing is to be totally consistent in the two different routines - present different stimuli to associate and respond to.
Even a bite from a hatchling python can draw a surprising amount of blood. The reason is that python's have long, fine teeth that readily penetrate to the dermis and even subcutaneous layer of the skin. These layers contain a multitude of capillary blood vessels. The longer the tooth, the more blood vessels will get ruptured as it penetrates down through the layers. This explains why a python bite often resulting in a surprising amount of initial bleeding. At the same time, the nerve ending for pain are quite scattered throughout these layers and are often not pierced by the fine teeth. This can result in little if any pain with a bite. Note that the same does not hold for the stouter teeth and stronger jaw muscles of large pythons -where you usually get plenty of blood and pain.
The danger to the snake of biting someone is that by by reflex action, a bitten person may pull away suddenly and break off quite a number of the teeth. These will regrow, but it can’t be a lot fun for the snake to lose a significant number in one hit.
Rather than using a hook or glove, you can try covering your hand in a pillow slip to get a hold on the snake to take it out. Once out, let it willingly slide into your other uncovered hand, of its own accord and in its own time. Persisting with this technique can overcome ‘cage protective’ behaviour in many cases. It does however depend on what else might be happening.