get a stellar claimable balance using python sdk for AQUA token

stellar-claimablebalance.py

from stellar_sdk import Server, Keypair, TransactionBuilder, Network, ClaimClaimableBalance                                                                                                               
import json, requests, getpass, sys
# to run save to file
# sudo pip3 install stellar-sdk=2.13.0
# and then python3 ./thisfile.py

hz = Server(horizon_url="https://horizon.stellar.org/")
passw = getpass.getpass('stellar private key: ')

kp = Keypair.from_secret(passw)
url = hz.horizon_url + "claimable_balances?claimant=" + kp.public_key
print(url)
r = requests.get(url)
print(r.text)
try:
    val = r.json()['_embedded']['records']
    print(json.dumps(val, indent=4))
    idw = str(val[0]['id'])
    print(f" get {idw}")
except:
    print('no claimable bal')
    sys.exit()

source_account = kp.public_key
tx = TransactionBuilder(source_account=hz.load_account(source_account))
tx.network_passphrase=Network.PUBLIC_NETWORK_PASSPHRASE
tx.base_fee = 900 
# create trust to AQUA
tx.append_change_trust_op('AQUA','GBNZILSTVQZ4R7IKQDGHYGY2QXL5QOFJYQMXPKWRRM5PAV7Y4M67AQUA')
# claim what is available
tx.append_claim_claimable_balance_op(balance_id=idw, source = source_account)
v = tx.build()
v.sign(kp)
hz.submit_transaction(v)