Years back I had a pair of argentine boas who were about 4-5 feet in length. Their temperament was great. Easy to handle and required very little work to make them kid safe for educational classes.
I have never owned or worked with an olive python before but I was told by a guy that had one that it would bite but it's strikes were slower than most of his other snakes and easily avoidable. He never tried to tame it for handling as it was not what he was in to however I highly doubt it would be hard. Most non venomous snakes I have come across can be made agreeable with the proper attention.