Does anyone know how do I get Arduino and Python talking to each other? I would essentially like to write my code and export it somehow to the arduino-uno.
The Arduino communicates with the PC (and vice-versa) normally using Serial. You can use the PySerial module in your python code to open the Arduino's serial port and read and write data, and the
Serial object in your Arduino code likewise.
What that data is, and what it means, though is up to you to decide upon and program.