Microsoft Face API command line Python 2.7 program

msfa_detect.py

#!/usr/bin/env python

# msfa_detect.py
#
# See https://www.microsoft.com/cognitive-services/en-us/face-api
# This code is based on the API reference sample code at
# https://dev.projectoxford.ai/docs/services/563879b61984550e40cbbe8d/operations/563879b61984550f30395236
#
# If they provide it with some sort of license that requires redistribution
# under the same license, then this code is hereby distributed under that
# license. Otherwise, this code is distributed under the terms of the
# MIT License, (c) Mike Chaberski 2016. 

import httplib, urllib, base64, json
import os, sys, os.path
from argparse import ArgumentParser

def do_detect(args):
    if args.api_key is None:
        with open(os.path.join(os.getenv("HOME"), '.config', 'microsoft', 'faceapi.credential'), 'r') as ifile:
            args.api_key = ifile.read().strip()
    with open(args.imagefile, 'rb') as ifile:
        imagedata = ifile.read()
    headers = {
        # Request headers
        'Content-Type': 'application/octet-stream',
        'Ocp-Apim-Subscription-Key': args.api_key,
    }

    params = urllib.urlencode({
        # Request parameters
        'returnFaceId': 'true',
        'returnFaceLandmarks': 'true',
        'returnFaceAttributes': args.attributes,
    })

    try:
        conn = httplib.HTTPSConnection('api.projectoxford.ai')
        conn.request("POST", "/face/v1.0/detect?%s" % params, imagedata, headers)
        response = conn.getresponse()
        data = json.loads(response.read())
        print json.dumps(data, indent=2)
        conn.close()
        return 0
    except Exception as e:
        print >> sys.stderr, "[Errno {0}] {1}".format(e.errno, e.strerror)
        return 2

_ATTRIBUTES = ('age','gender','headPose','smile','facialHair','glasses')

if __name__ == '__main__':
    p = ArgumentParser(description="Submits an image file to Microsoft Face API for face detection and prints the result")
    p.add_argument("imagefile", help="image file to send to Microsoft for face detection")
    p.add_argument("--attributes", default=','.join(_ATTRIBUTES), help="attributes to include in response; choose from " + str(_ATTRIBUTES) + ", comma-delimited")
    p.add_argument("--api-key", help="subscription key to use; if absent, key is assumed to be the text content of $HOME/.config/microsoft/faceapi.credential")
    args = p.parse_args()
    exit(do_detect(args))