For example, price, iv, delta, gamma, volume, and open interest
Interactive Brokers posted a webinar on Dec 13 2016 about using IBridgePy to connect to IB's API. https://www.youtube.com/watch?v=hogXB07OJ_I. It is pretty easy to request real time price of option data. You may check out the website of IBridgePy at www.IBridgePy.com To learn how to use it, you may refer to its documentation.