RESTful Python API in 50 Lines or Less (Listens for HTTP Requests and Spits out JSON)

simple_api_example.py

# Import Flask
from flask import Flask, render_template, request, jsonify, session, redirect, url_for, Response

app = Flask(__name__)

# REFERENCE: http://blog.luisrei.com/articles/flaskrest.html
@app.route('/dictionary-to-json-test', methods=['GET', 'POST'])
def dictionary_to_json_test():

    list_of_categories = []

    first_category = {
        "name": "Fast Food",
        "number_of_transactions": 13,
        "amount_spent": 427.33
    }

    second_category = {
        "name": "Restaurants",
        "number_of_transactions": 1,
        "amount_spent": 54.0
    }

    third_category = {
        "name": "Entertainment",
        "number_of_transactions": 2,
        "amount_spent": 125.0
    }

    list_of_categories.append(first_category)
    list_of_categories.append(second_category)
    list_of_categories.append(third_category)

    dictionary_of_dictionaries = {
        "category": list_of_categories
    }

    # Convert Dictionary to JSON
    json_obj = json.dumps(dictionary_of_dictionaries)

    # Create Response Object
    response_obj = Response(json_obj, status=200, mimetype='application/json')
    
    # Return JSON (Response Object)
    return response_obj

if __name__ == "__main__":
    app.run()