I assume you mean you want to get it into a PC so you can do something with it using Python.
If it's regular UART serial data you can convert it to RS-232 levels and plug into the serial port or USB-serial converter. The Python script would read the serial port configured at 1200 baud.
You can send the data over serial to the PC from your Arduino, either through a physical link or wireless serial adapters.
The most complicated option is to create a software defined radio in the PC. There are a number of tutorials and examples for using USB-TV tuners to create a SDR, but as far as I know they are all geared towards reading audio signals, but if you have the signal digitally I doubt it would be too difficult to decode it, especially at such a slow data rate.
I've seen a few people who have tried to bring Python to embedded systems, but I've not seen anything that I would consider to be ready for prime time; just limited functionality demonstrations.