lambdaTest3.py

import json
import urllib.request

def respond(err, res=None):
    return {
        'statusCode': '400' if err else '200',
        'body': err.message if err else json.dumps(res),
        'headers': {
            'Content-Type': 'application/json',
        },
    }

def lambda_handler(event, context):
    operation = event["context"]['http-method']
    if operation == "GET":
        searchString = event["params"]["querystring"]["query"]
        searchText = searchString.replace(" ", "+")
        #formatted the search string to make sure it works with the giphy API
        req = urllib.request.Request(
            "http://api.giphy.com/v1/gifs/search?q={}&api_key=dc6zaTOxFJmzC".format(searchText))
        with urllib.request.urlopen(req) as response:
            #Read the response
            the_page = response.read()
        #loading the response as a json file
        #you may use ast too
        a = json.loads(the_page)
        return respond(None,a["data"][0]["images"]["fixed_height"]["url"])
    else:
        return respond(ValueError('Unsupported method "{}"'.format(operation)))