text: from flask import Flask, request
  from flask_cors import CORS
  import secrets
  from modeling.unified import *
  from utils.countries import *
  from utils.policies import *
  import json
  import numpy as np
  
  app = Flask(__name__)
  CORS(app)
  
  update_func = dict()
  
  @app.route('/init', methods=['POST'])
  def init():
      return {
          "countries": getAvailableCountries(),
          "policies": getPolicyMap(),
          "uid": secrets.token_urlsafe(8)
      }
  
  @app.route('/load', methods=['POST'])
  def load2():
      body = request.json
      uid = body['uid']
      country_iso = getIso(body['country'])
      tfrom = body['tframe']['from']
      tuntil = body['tframe']['until']
      _, sub_data, update = load(country_iso, tfrom, tuntil)
      policies, target, dates, pred = sub_data
      update_func[uid] = update
      return {
          "pred": list(np.nan_to_num(pred)),
          "target": list(np.nan_to_num(target)),
          "dates": [str(x) for x in dates],
          "policies": {k: list(v) for k, v in policies.items()}
      }
  
  @app.route('/update', methods=['GET', 'POST'])
  def update():
      body = request.json
      uid = body['uid']
      country_iso = getIso(body['country'])
      tfrom = body['tframe']['from']
      tuntil = body['tframe']['until']
      policies = body['policies']
      pred, target, dates = update_func[uid](country_iso, tfrom, tuntil, policies)
      return {
          "pred": list(np.nan_to_num(pred)),
          "target": list(np.nan_to_num(target)),
          "dates": [str(x) for x in dates],
      }
  
  @app.route('/', methods=['POST'])
  def api():
      return {}