Sorry to hear about this sad outcome. I had picked up a pair of adult Burms many years ago. The adult female had all the indications of a respiratory infection and I treated her with antibiotics...I think it was Baytril, perhaps. Did not realize she was gravid and the seller did not mention to me that he had been trying to breed them. Anyway...she got over the respiratory infection and I came out one day and found her wrapped around 60+ eggs. Was the first time I ever had a snake lay eggs and I was ecstatic. Sadly, none of them hatched. They began to form mold and I came to the realization that none were viable. After talking to the vet, realized that antibiotics can have bad implications for a litter/clutch of snakes.
Hope the next time will turn out much better for you and the python.