python json read and sort dictionary list

json_read_sort.py

#!/usr/bin/env python
#Date: 05/03/2016
#Author: Mohan Balasundaram
#Purpose: To read a json file with a dictionary list and sort the output

import json
import sys

json_filename=sys.argv[1]
#print json_filename

try:
    json_file=open(json_filename)
    json_data=json.load(json_file)
except IOError:
    print "Error: File does not appear to exist."
finally:
    json_file.close()

my_dict={}

for item in json_data['result']:
    #print item['templateid'], ": ",item['name']
    my_dict.update({ item['templateid']: item['name']})

for key in sorted(my_dict.iterkeys()):
    print "%s: %s" % (key, my_dict[key])


"""
#sample data structure
{
    "id": 1,
    "jsonrpc": "2.0",
    "result": [
        {
            "name": "linux",
            "templateid": "10"
        },
        {
            "name": "windows",
            "templateid": "100"
        },
    ]
}
"""