encrypt and dectypt with AWS KMS

hellp_kms.py

import boto3
import base64

key_id = 'de5bb9e8-6526-49bc-822f-4e8a70ea7a19'

def hello_kms():
    session = boto3.session.Session(profile_name='caveman')
    client = session.client('kms')

    encryption_result = client.encrypt(KeyId=key_id, 
    Plaintext='hello, kms!')

    blob = encryption_result['CiphertextBlob']
    print(base64.b64encode(blob))


    encrypted_text = 'AQICAHiSlodFOEUS/C7q2g4iQJwHune3s0bOhgRrXt1frVNdEQHe24+3H6mXLL2Y02Ck4qenAAAAaTBnBgkqhkiG9w0BBwagWjBYAgEAMFMGCSqGSIb3DQEHATAeBglghkgBZQMEAS4wEQQMKXU3aoKqQeEFtkduAgEQgCbxscVZZNctXP9sslbd34hAbIaidVYteEokvBkzykdZMGbPHq9hcA=='
    decrypted = client.decrypt(CiphertextBlob=base64.b64decode(encrypted_text))
    print(decrypted['Plaintext'])

if __name__ == "__main__":
    hello_kms()

I was trapped to use cli command aws kms encrypt --key-id xxxx --plaintext testext --output text and got a string very similar to the encrypted_text above.
Finally I have to use this script to regenerate the encrypted_text and my code worked.
Thank you.

Then trapped by running aws kms decrypt --ciphertext-blob xxxx and got good result.
But when I used the wrong encrypted_text in my python code. Broken.
This caused me 4 hours.