What is a good weight for a 2' 6" ball python?

Mine weighed 450g, then 400 - 420g after it pooped.

Last week was the first time I fed it a small rat. It was eating large mice before that. It looks like a healthy ball. Doesn't look over weight. But then again... I am a beginer to all this. So some opinions would be very much apreciated.

Also should I feed her every two weeks, week and a half, oir week? When I was feeding mice I fed her weekly.
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0.0.1 Ball Python
0.0.1 Checkard Garter Snake
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