Python - 将非常大（6.4GB）的XML文件转换为JSON

Essentially, I have a 6.4GB XML file that I'd like to convert to JSON then save it to disk. I'm currently running OSX 10.8.4 with an i7 2700k and 16GBs of ram, and running Python 64bit (double checked). I'm getting an error that I don't have enough memory to allocate. How do I go about fixing this?Essentially, I have a 6.4GB XML file that I'd l