Corresponding AES encrypt/decrypt from JavaScript to Python

Question

Recently I want to port the original Javascript AES256 encryption code to Python, I've seen lots of posts (e.g. *1, *2) , but that's not I want.

I want a simple function without extra settings, only input the payload and key, output the encrypted/decrypted payload, corresponding to the below two functions.

function encrypt (payload, key) {
  var cipher = crypto.createCipher('aes256', key)
  var encryptedPayload = cipher.update(payload, 'utf8', 'hex')
  encryptedPayload += cipher.final('hex')
  return encryptedPayload
}

function decrypt (payload, key) {
  const decipher = crypto.createDecipher('aes256', key)
  let decryptedPayload = decipher.update(payload, 'hex', 'utf8')
  decryptedPayload += decipher.final('utf8')
  return decryptedPayload
}

I cannot find any solution to this. Does that mean this problem is difficult or the spec mismatch between Javascript and Python's library?

Or if I want to make it happened, can I contribute to PyCrypto or some open source?

Thanks!