Serverless Lambda API with Python

main.js

/* This file contains two files */

/* index.py */
import json

def handler(event, context):
  body = {
    "message": "Hello from Lambda!"
  }

  response = {
    "statusCode": 200,
    "body": json.dumps(body),
    "headers": {
      "Content-Type": "application/json",
      "Access-Control-Allow-Origin": "*"
    }
  }
  
  return response

/* App.js */
import React, { useState, useEffect } from 'react';
import logo from './logo.svg';
import './App.css';

import { API } from 'aws-amplify'

function App() {
  const [greeting, setGreeting] = useState(null)
  async function fetchGreeting() {
    const apiData = await API.get('mypythonapi', '/greeting')
    setGreeting(apiData.message)
  }
  useEffect(() => {
    fetchGreeting()
  }, [])
  return (
    <div className="App">
      <header className="App-header">
        <img src={logo} className="App-logo" alt="logo" />
        <h1>{greeting}</h1>
      </header>
    </div>
  );
}

export default App;