The MPL3115A2 is a handy high precision barometric pressure that you can read from CircuitPython and Python code!  This sensor provides pressure, temperature, and even calculates altitude (based on pressure) automatically for you.  Best of all with a simple CircuitPython module you can read data from the sensor with ease.  This guide shows how to connect a MPL3115A2 to a CircuitPython board and read data from it with Python code!