gistfile1.py

import json
import csv 
import cStringIO

JSON = '''
{"items": [
	{"name": "Test One", "integer": 45},
 	{"name": "Test Two", "integer": 76},
	{"name": "Test Three", "integer": 42}
 ]
}
'''

data = json.loads(JSON)
items = data['items']

output = cStringIO.StringIO()
writer = csv.DictWriter(output, items[0].keys())
writer.writeheader()
for row in items:
	writer.writerow(row)

print output.getvalue()

Output

bbennett@annav-t420s:~<1>$ python jsontest.py
integer,name
45,Test One
76,Test Two
42,Test Three