Python script for "Google search by image"

I have checked Google Search API's and it seems that they have not released any API for searching "Images". So, I was wondering if there exists a python script/library through which I can automate the "search by image feature".

Solution

This was annoying enough to figure out that I thought I'd throw a comment on the first python-related stackoverflow result for "script google image search". The most annoying part of all this is setting up your proper application and custom search engine (CSE) in Google's web UI, but once you have your api key and CSE, define them in your environment and do something like:

#!/usr/bin/env python

# save top 10 google image search results to current directory
# https://developers.google.com/custom-search/json-api/v1/using_rest

import requests
import os
import sys
import re
import shutil

url = 'https://www.googleapis.com/customsearch/v1?key={}&cx={}&searchType=image&q={}'
apiKey = os.environ['GOOGLE_IMAGE_APIKEY']
cx = os.environ['GOOGLE_CSE_ID']
q = sys.argv[1]

i = 1
for result in requests.get(url.format(apiKey, cx, q)).json()['items']:
  link = result['link']
  image = requests.get(link, stream=True)
  if image.status_code == 200:
    m = re.search(r'[^\.]+$', link)
    filename = './{}-{}.{}'.format(q, i, m.group())
    with open(filename, 'wb') as f:
      image.raw.decode_content = True
      shutil.copyfileobj(image.raw, f)
    i += 1