code_review.py

from flask import Flask, request, jsonify
from myapp import db

app = Flask(__name__)

@app.route('/user', methods=['POST'])
def create():
    data = request.json

    username = data.get('username')
    email = data.get('email')
    password = data.get('password')

    new_user = {
        'id': gen_id(username),
        'username': username,
        'email': email,
        'password': password
    }

    db.insert_user(new_user)

    people = db.fetch_all_users() # Example output: [{'id': '123', 'username': 'user1', 'email': 'user1@myapp.com', 'password': 'mypassword'}, ...]
    for user1 in people:
        for user2 in people:
            if user1 != user2 and user1['username'] == user2['username']:
                db.delete_user(new_user)
                return jsonify({"error": "Username already exists"}), 400

    return jsonify({"user": new_user}), 200

def gen_id(u):
    return sum([ord(c) for c in u])

if __name__ == '__main__':
    app.run(port=80)