Response to TriPython mailing list question: http://starship.python.net/pipermail/triangle-zpug/2014-December/001963.html

data.json

{
    "log": {
        "id": "http://192.168.43.81:8080/api/collections/nodes/node1/log",
        "name": "log"
    },
    "tags": [],
    "facts": {
        "hardwareisa": "x86_64",
        "macaddress": "08:00:27:e7:06:4d",
        "architecture": "x86_64",
        "hardwaremodel": "x86_64",
        "processor0": "Intel(R) Core(TM) i7-4770HQ CPU @ 2.20GHz",
        "processorcount": "1",
        "interfaces": "enp0s17,lo",
        "ipaddress_enp0s17": "192.168.1.63"
    }
}

getmac.py

import json

# Option 1: Read JSON directly from file object:
data = json.load(open('data.json'))

# Option 2: Read file into string, then parse as JSON:
s = open('data.json').read()
data = json.loads(s)

# Read the MAC address from the data, or set to None if it can't be found.
try:
    macaddress = data['facts']['macaddress']
except KeyError:
    macaddress = None

print(macaddress)