A simple, no-dependencies script to convert a structure to and from various formats using the MAVRL's matgenie REST interface.

convert_struct.py

#!/usr/bin/env python

import json
import urllib
import urllib2
import sys

if len(sys.argv) != 4:
    print('Usage is "python convert_struct.py filename input_format output_format".'
          'Input/output formats should be any one of poscar, cif, cssr or mson')
    sys.exit(-1)

url = "http://mavrl.org/matgenie/convert"
with open(sys.argv[1]) as f:
    content = f.read()
    data = urllib.urlencode({"input-format": sys.argv[2], "output-format": sys.argv[3], "file-content": content})
    req = urllib2.Request(url, data)
    response = urllib2.urlopen(req)
    data = json.loads(response.read())
    if response.getcode() == 200:
        print data["converted-file"]
    else:
        print "Error has occured : {}".format(data["error"])