hi i found some methods in one of my ball python books. ( i have read about three in the last week as i am new to ball pythons)
brown bag method
basically all you do is get a brown grocery bag. punch a fewsmall holes in it. put you snake in it with a still blind mouse. fold the top shut. put it in your tank over night and do not desturb until morning. make sure the air temp is between 85-90 deg. if it dosent work the first time do not get discourged try once a week for three weeks.
the next is what in my opinion is the most natural for your ball python.
rodent in a hole method.
all you do is take all the hides out of your cage put a bucket in it with a small blind rodent in it. drill a hole in it high enaugh for you snake to reach the hole . but just out of reach for the rodent. put some substrate in the bottom put the lid on then leave it alone till morning. do not peek or touch even if you hear a noise that sounded like you snake just fed. ( he might of just been about to feed then you disrupted the hole shebang.) make sure the air temp is agani 85-90deg. if no success try again once a week for three more weeks. if no success try a small adult mouse for three weeks if that dosent work try a pree killed adult mouse for ....... you guessed it 3 more weeks.
before you resort to force feeding.
ale this info came from the vets and doctors of the herpetocultural libary in the book
the ball python manual
hope this helps
fish