app.py

import os
import json
from flask import Flask, Response, abort, request

app = Flask(__name__)

data = {
    '123': 100,
    '321': 1,
    '50': 98
}

@app.route('/update', methods=['POST'])
def item_update():
    if not request.json:
        abort(400)
    pk = request.json['pk']
    score = request.json['score']
    data[str(pk)] = int(score)

    return Response("pk " + str(pk) + " updated with score " + str(score), status=200)

@app.route('/get/<int:pk>', methods=['GET'])
def item_score(pk):
    if str(pk) in data.keys():
        score = data[str(pk)]
    else:
        return Response('pk ' + str(pk) + ' not found', status=400)

    if score is None:
        abort(404)

    content = json.dumps({ 'pk': str(pk), 'score': str(score) })
    return Response(content, status=200, mimetype='application/json')

@app.route('/', methods=['GET'])
def sample():
    return 'Welcome to this sample app :)'

@app.errorhandler(404)
def not_found(e):
    return '', 404

if __name__ == '__main__':
    app.run(debug=True,host='0.0.0.0')