I find that the technique put forth by Justin Kobylka for aggressive young ball pythons works very well. It seems like it might be worth a try in this case. It's flightiness as opposed to aggressiveness I know. 900 grams is a healthy animal but what I would do is place the animal on a soft comfortable surface and try to get her into a coiled position and then use both hands and cup them softly but firmly over the top of the python limiting her movements. Every time she tries to crawl away you softly but firmly bring her back under your cupped hands. Your not hurting her at all but you are dominating her and her movements. I would do this for about 5 to 10 minutes tops. It will be a process that will have to be practiced but it may help.