Many believe that the Oracle of Delphi (woman) was servants of the god Apollo and have always been. However, that was not the case. Python was a monstrous serpent which Gaia (Mother Earth) appointed to guard the oracle at Delphoi. When Apollo wanted to claim Delphi, legend says he slew the beast.
Legend has it that in the days of yore Delphi was regarded as the center of the world largely due to the fact that it was in Delphi that the two eagles assembled after Zeus set them free. One was freed from the eastern side while the other from the west.
Some of the predictions were surprisingly accurate, according to legend. Croesus, the richest man of his time, performed a kind of scientific test on oracles, when he had messengers go out to all of them and ask what he would be doing on a certain date. Delphi got the only correct answer — cooking a tortoise in a pot. Which is surprising that he wouldn’t have servants cook for him.
Even today, archeologist are not sure what caused the Oracle of Delphi to come up with her babblings, which were then interpreted by priests. It might have been gas in the cave, lack of oxygen, or something else. We may never know for certainty.