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Creating a Simple REST API with Flask

Tutorial August 03, 2024
python 

from flask import Flask, jsonify, request, abort

app = Flask(__name__)

items = [
    {"id": 1, "name": "Item 1", "price": 100},
    {"id": 2, "name": "Item 2", "price": 150},
    {"id": 3, "name": "Item 3", "price": 200}
]

@app.route('/api/items', methods=['GET'])
def get_items():
    return jsonify(items)

@app.route('/api/items/<int:item_id>', methods=['GET'])
def get_item(item_id):
    item = next((item for item in items if item["id"] == item_id), None)
    if item is None:
        abort(404)
    return jsonify(item)

@app.route('/api/items', methods=['POST'])
def create_item():
    if not request.json or 'name' not in request.json or 'price' not in request.json:
        abort(400)
    new_item = {
        "id": items[-1]['id'] + 1 if items else 1,
        "name": request.json['name'],
        "price": request.json['price']
    }
    items.append(new_item)
    return jsonify(new_item), 201

@app.route('/api/items/<int:item_id>', methods=['PUT'])
def update_item(item_id):
    item = next((item for item in items if item["id"] == item_id), None)
    if item is None:
        abort(404)
    if not request.json:
        abort(400)
    item['name'] = request.json.get('name', item['name'])
    item['price'] = request.json.get('price', item['price'])
    return jsonify(item)

@app.route('/api/items/<int:item_id>', methods=['DELETE'])
def delete_item(item_id):
    item = next((item for item in items if item["id"] == item_id), None)
    if item is None:
        abort(404)
    items.remove(item)
    return jsonify({"result": True})

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

You can use Postman or curl to test the API.

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