ASA error in python

I deployed these below code:
code:

import json
from algosdk.v2client import algod
from algosdk import account, mnemonic
from algosdk.future.transaction import AssetConfigTxn, AssetTransferTxn, AssetFreezeTxn


# Shown for demonstration purposes. NEVER reveal secret mnemonics in practice.
# Change these values with your mnemonics
# mnemonic1 = "PASTE your phrase for account 1"
# mnemonic2 = "PASTE your phrase for account 2"
# mnemonic3 = "PASTE your phrase for account 3"

mnemonic1 = "sunny desk host car share soul ill soon swamp gravity chase juice drop mushroom already naive fence quiz picture special resource mutual plate abstract rose"
mnemonic2 = "rescue increase uncover lion race phrase script stool film monster item attract spring total bottom immense path wife describe half wash copper atom abstract novel"
mnemonic3 = "believe fire table wing hurt gather allow quality auto seven negative replace wrap fish silent wonder maze wild air brush boost kitchen exist above heavy"


# For ease of reference, add account public and private keys to
# an accounts dict.
accounts = {}
counter = 1
for m in [mnemonic1, mnemonic2, mnemonic3]:
    accounts[counter] = {}
    accounts[counter]['pk'] = mnemonic.to_public_key(m)
    accounts[counter]['sk'] = mnemonic.to_private_key(m)
    counter += 1

# Specify your node address and token. This must be updated.
# algod_address = ""  # ADD ADDRESS
# algod_token = ""  # ADD TOKEN

algod_token = 'my token value'
algod_address = 'https://testnet-algorand.api.purestake.io/ps2'
purestake_token = {'X-Api-key': algod_token}

# Initialize an algod client
algod_client = algod.AlgodClient(algod_token, algod_address, headers=purestake_token)

def wait_for_confirmation(client, txid):
    """
    Utility function to wait until the transaction is
    confirmed before proceeding.
    """
    last_round = client.status().get('last-round')
    txinfo = client.pending_transaction_info(txid)
    while not (txinfo.get('confirmed-round') and txinfo.get('confirmed-round') > 0):
        print("Waiting for confirmation")
        last_round += 1
        client.status_after_block(last_round)
        txinfo = client.pending_transaction_info(txid)
    print("Transaction {} confirmed in round {}.".format(txid, txinfo.get('confirmed-round')))
    return txinfo

#   Utility function used to print created asset for account and assetid
def print_created_asset(algodclient, account, assetid):    
    # note: if you have an indexer instance available it is easier to just use this
    # response = myindexer.accounts(asset_id = assetid)
    # then use 'account_info['created-assets'][0] to get info on the created asset
    account_info = algodclient.account_info(account)
    idx = 0;
    for my_account_info in account_info['created-assets']:
        scrutinized_asset = account_info['created-assets'][idx]
        idx = idx + 1       
        if (scrutinized_asset['index'] == assetid):
            print("Asset ID: {}".format(scrutinized_asset['index']))
            print(json.dumps(my_account_info['params'], indent=4))
            break

#   Utility function used to print asset holding for account and assetid
def print_asset_holding(algodclient, account, assetid):
    # note: if you have an indexer instance available it is easier to just use this
    # response = myindexer.accounts(asset_id = assetid)
    # then loop thru the accounts returned and match the account you are looking for
    account_info = algodclient.account_info(account)
    idx = 0
    for my_account_info in account_info['assets']:
        scrutinized_asset = account_info['assets'][idx]
        idx = idx + 1        
        if (scrutinized_asset['asset-id'] == assetid):
            print("Asset ID: {}".format(scrutinized_asset['asset-id']))
            print(json.dumps(scrutinized_asset, indent=4))
            break

print("Account 1 address: {}".format(accounts[1]['pk']))
print("Account 2 address: {}".format(accounts[2]['pk']))
print("Account 3 address: {}".format(accounts[3]['pk']))

# your terminal output should look similar to the following
# Account 1 address: ATTR6RUEHHBHXKUHT4GUOYWNBVDV2GJ5FHUWCSFZLHD55EVKZWOWSM7ABQ
# Account 2 address: AK6Q33PDO4RJZQPHEMODC6PUE5AR2UD4FBU6TNEJOU4UR4KC6XL5PWW5K4
# Account 3 address: IWR4CLLCN2TIVX2QPVVKVR5ER5OZGMWAV5QB2UIPYMPKBPLJZX4C37C4AA

# CREATE ASSET
# Get network params for transactions before every transaction.
params = algod_client.suggested_params()
# comment these two lines if you want to use suggested params
params.fee = 1000
params.flat_fee = True

# Account 1 creates an asset called latinum and
# sets Account 2 as the manager, reserve, freeze, and clawback address.
# Asset Creation transaction

txn = AssetConfigTxn(
    sender=accounts[1]['pk'],
    sp=params,
    total=1000,
    default_frozen=False,
    unit_name="Harish007",
    asset_name="HarishCoin1",
    manager=accounts[2]['pk'],
    reserve=accounts[2]['pk'],
    freeze=accounts[2]['pk'],
    clawback=accounts[2]['pk'],
    url="https://path/to/my/asset/details", 
    decimals=0)
# Sign with secret key of creator
stxn = txn.sign(accounts[1]['sk'])

# Send the transaction to the network and retrieve the txid.
txid = algod_client.send_transaction(stxn)
print(txid)

# Retrieve the asset ID of the newly created asset by first
# ensuring that the creation transaction was confirmed,
# then grabbing the asset id from the transaction.

# Wait for the transaction to be confirmed
wait_for_confirmation(algod_client,txid)

try:
    # Pull account info for the creator
    # account_info = algod_client.account_info(accounts[1]['pk'])
    # get asset_id from tx
    # Get the new asset's information from the creator account
    ptx = algod_client.pending_transaction_info(txid)
    asset_id = ptx["asset-index"]
    print_created_asset(algod_client, accounts[1]['pk'], asset_id)
    print_asset_holding(algod_client, accounts[1]['pk'], asset_id)
except Exception as e:
    print(e)

# terminal output should be similar to below
# Transaction WVG5HSCU7OIMFHLQGMPJF3NZ56A6FE3DMFUNBUKH73ZUMIU3N3HA confirmed in round 3982822.
# Waiting for confirmation...
# Transaction DDDNZWERVG54J32PLCJQENLC5FAFIFYY6ZSYRY25C3J26TJKJ5IA confirmed in round 3982906.
# Asset ID: 2653870
# {
#     "clawback": "AK6Q33PDO4RJZQPHEMODC6PUE5AR2UD4FBU6TNEJOU4UR4KC6XL5PWW5K4",
#     "creator": "ATTR6RUEHHBHXKUHT4GUOYWNBVDV2GJ5FHUWCSFZLHD55EVKZWOWSM7ABQ",
#     "decimals": 0,
#     "default-frozen": false,
#     "freeze": "AK6Q33PDO4RJZQPHEMODC6PUE5AR2UD4FBU6TNEJOU4UR4KC6XL5PWW5K4",
#     "manager": "AK6Q33PDO4RJZQPHEMODC6PUE5AR2UD4FBU6TNEJOU4UR4KC6XL5PWW5K4",
#     "metadata-hash": "MTZlZmFhMzkyNGE2ZmQ5ZDNhNDgyNDc5OWE0YWM2NWQ=",
#     "name": "latinum",
#     "reserve": "AK6Q33PDO4RJZQPHEMODC6PUE5AR2UD4FBU6TNEJOU4UR4KC6XL5PWW5K4",
#     "total": 1000,
#     "unit-name": "LATINUM",
#     "url": "https://path/to/my/asset/details"
# }
# Asset ID: 2653870
# {
#     "amount": 1000,
#     "asset-id": 2653870,
#     "creator": "ATTR6RUEHHBHXKUHT4GUOYWNBVDV2GJ5FHUWCSFZLHD55EVKZWOWSM7ABQ",
#     "is-frozen": false
# }


# CHANGE MANAGER

# The current manager(Account 2) issues an asset configuration transaction that assigns Account 1 as the new manager.
# Keep reserve, freeze, and clawback address same as before, i.e. account 2
params = algod_client.suggested_params()
# comment these two lines if you want to use suggested params
params.fee = 1000
params.flat_fee = True

# asset_id = 328952;

txn = AssetConfigTxn(
    sender=accounts[2]['pk'],
    sp=params,
    index=asset_id, 
    manager=accounts[1]['pk'],
    reserve=accounts[2]['pk'],
    freeze=accounts[2]['pk'],
    clawback=accounts[2]['pk'])
# sign by the current manager - Account 2
stxn = txn.sign(accounts[2]['sk'])
txid = algod_client.send_transaction(stxn)
print(txid)

# Wait for the transaction to be confirmed
wait_for_confirmation(algod_client, txid)

# Check asset info to view change in management. manager should now be account 1
print_created_asset(algod_client, accounts[1]['pk'], asset_id)
# terminal output should be similar to...
# Transaction Y7EYBJNFP7YPGCV7ZD47PMJZHXB2PRT3SZ534M7BZE7G55IMPKUA confirmed in round 3982910.
# Asset ID: 2653870
# {
#     "clawback": "AK6Q33PDO4RJZQPHEMODC6PUE5AR2UD4FBU6TNEJOU4UR4KC6XL5PWW5K4",
#     "creator": "ATTR6RUEHHBHXKUHT4GUOYWNBVDV2GJ5FHUWCSFZLHD55EVKZWOWSM7ABQ",
#     "decimals": 0,
#     "default-frozen": false,
#     "freeze": "AK6Q33PDO4RJZQPHEMODC6PUE5AR2UD4FBU6TNEJOU4UR4KC6XL5PWW5K4",
#     "manager": "ATTR6RUEHHBHXKUHT4GUOYWNBVDV2GJ5FHUWCSFZLHD55EVKZWOWSM7ABQ",
#     "metadata-hash": "MTZlZmFhMzkyNGE2ZmQ5ZDNhNDgyNDc5OWE0YWM2NWQ=",
#     "name": "latinum",
#     "reserve": "AK6Q33PDO4RJZQPHEMODC6PUE5AR2UD4FBU6TNEJOU4UR4KC6XL5PWW5K4",
#     "total": 1000,
#     "unit-name": "LATINUM",
#     "url": "https://path/to/my/asset/details"
# }

# OPT-IN

# Check if asset_id is in account 3's asset holdings prior
# to opt-in
params = algod_client.suggested_params()
# comment these two lines if you want to use suggested params
params.fee = 1000
params.flat_fee = True

account_info = algod_client.account_info(accounts[3]['pk'])
holding = None
idx = 0
for my_account_info in account_info['assets']:
    scrutinized_asset = account_info['assets'][idx]
    idx = idx + 1    
    if (scrutinized_asset['asset-id'] == asset_id):
        holding = True
        break

if not holding:

    # Use the AssetTransferTxn class to transfer assets and opt-in
    txn = AssetTransferTxn(
        sender=accounts[3]['pk'],
        sp=params,
        receiver=accounts[3]["pk"],
        amt=0,
        index=asset_id)
    stxn = txn.sign(accounts[3]['sk'])
    txid = algod_client.send_transaction(stxn)
    print(txid)
    # Wait for the transaction to be confirmed
    wait_for_confirmation(algod_client, txid)
    # Now check the asset holding for that account.
    # This should now show a holding with a balance of 0.
    print_asset_holding(algod_client, accounts[3]['pk'], asset_id)

# terminal output should look similar to this...

# Transaction ACYWQVRO6XKQNIHHGH7PDIPKPGURES6YA7OCI654PTR75RKTL4FA confirmed in round 3982915.
# Asset ID: 2653870
# {
#     "amount": 0,
#     "asset-id": 2653870,
#     "creator": "ATTR6RUEHHBHXKUHT4GUOYWNBVDV2GJ5FHUWCSFZLHD55EVKZWOWSM7ABQ",
#     "is-frozen": false
# }

# TRANSFER ASSET

# transfer asset of 10 from account 1 to account 3
params = algod_client.suggested_params()
# comment these two lines if you want to use suggested params
params.fee = 1000
params.flat_fee = True
txn = AssetTransferTxn(
    sender=accounts[1]['pk'],
    sp=params,
    receiver=accounts[3]["pk"],
    amt=10,
    index=asset_id)
stxn = txn.sign(accounts[1]['sk'])
txid = algod_client.send_transaction(stxn)
print(txid)
# Wait for the transaction to be confirmed
wait_for_confirmation(algod_client, txid)
# The balance should now be 10.
print_asset_holding(algod_client, accounts[3]['pk'], asset_id)

# terminal output should look similar to this...
# Transaction AYL3FKK6IUWRV2RRCWFBZYO3STX2D74XML6HFWH4EELSDLMLUCCQ confirmed in round 3982920.
# Asset ID: 2653870
# {
#     "amount": 10,
#     "asset-id": 2653870,
#     "creator": "ATTR6RUEHHBHXKUHT4GUOYWNBVDV2GJ5FHUWCSFZLHD55EVKZWOWSM7ABQ",
#     "is-frozen": false
# }

# FREEZE ASSET

params = algod_client.suggested_params()
# comment these two lines if you want to use suggested params
params.fee = 1000
params.flat_fee = True
# The freeze address (Account 2) freezes Account 3's latinum holdings.

txn = AssetFreezeTxn(
    sender=accounts[2]['pk'],
    sp=params,
    index=asset_id,
    target=accounts[3]["pk"],
    new_freeze_state=True   
    )
stxn = txn.sign(accounts[2]['sk'])
txid = algod_client.send_transaction(stxn)
print(txid)
# Wait for the transaction to be confirmed
wait_for_confirmation(algod_client, txid)
# The balance should now be 10 with frozen set to true.
print_asset_holding(algod_client, accounts[3]['pk'], asset_id)

# Terminal output should look similar to this wih a frozen value of true...
# Transaction 5NFHUQ4GEQMT4EFPMIIBTHNOX4LS5GQLZRKCKCA2GAUVAS4PAGJQ confirmed in round 3982928.
# Asset ID: 2653870
# {
#     "amount": 10,
#     "asset-id": 2653870,
#     "creator": "ATTR6RUEHHBHXKUHT4GUOYWNBVDV2GJ5FHUWCSFZLHD55EVKZWOWSM7ABQ",
#     "is-frozen": true
# }

# REVOKE ASSET

# The clawback address (Account 2) revokes 10 latinum from Account 3 and places it back with Account 1.
params = algod_client.suggested_params()
# comment these two lines if you want to use suggested params
params.fee = 1000
params.flat_fee = True

# Must be signed by the account that is the Asset's clawback address
txn = AssetTransferTxn(
    sender=accounts[2]['pk'],
    sp=params,
    receiver=accounts[1]["pk"],
    amt=10,
    index=asset_id,
    revocation_target=accounts[3]['pk']
    )
stxn = txn.sign(accounts[2]['sk'])
txid = algod_client.send_transaction(stxn)
print(txid)
# Wait for the transaction to be confirmed
wait_for_confirmation(algod_client, txid)
# The balance of account 3 should now be 0.
# account_info = algod_client.account_info(accounts[3]['pk'])
print("Account 3")
print_asset_holding(algod_client, accounts[3]['pk'], asset_id)

# The balance of account 1 should increase by 10 to 1000.
print("Account 1")
print_asset_holding(algod_client, accounts[1]['pk'], asset_id)

# Terminal output should be similar to...
# Transaction 4UFNTECSEBAGJT52XLIBM7BQXHBTXUHLZ2U4M4XTZUAVE4VLKURQ confirmed in round 3982932.
# Account 3
# Asset ID: 2653870
# {
#     "amount": 0,
#     "asset-id": 2653870,
#     "creator": "ATTR6RUEHHBHXKUHT4GUOYWNBVDV2GJ5FHUWCSFZLHD55EVKZWOWSM7ABQ",
#     "is-frozen": true
# }
# Account 1
# Asset ID: 2653870
# {
#     "amount": 1000,
#     "asset-id": 2653870,
#     "creator": "ATTR6RUEHHBHXKUHT4GUOYWNBVDV2GJ5FHUWCSFZLHD55EVKZWOWSM7ABQ",
#     "is-frozen": false
# }

# DESTROY ASSET
# With all assets back in the creator's account,
# the manager (Account 1) destroys the asset.
params = algod_client.suggested_params()
# comment these two lines if you want to use suggested params
params.fee = 1000
params.flat_fee = True

# Asset destroy transaction
txn = AssetConfigTxn(
    sender=accounts[1]['pk'],
    sp=params,
    index=asset_id,
    strict_empty_address_check=False
    )

# Sign with secret key of creator
stxn = txn.sign(accounts[1]['sk'])
# Send the transaction to the network and retrieve the txid.
txid = algod_client.send_transaction(stxn)
print(txid)
# Wait for the transaction to be confirmed
wait_for_confirmation(algod_client, txid)

# Asset was deleted.
try:
    print("Account 3 must do a transaction for an amount of 0, " )
    print("with a close_assets_to to the creator account, to clear it from its accountholdings")
    print("For Account 1, nothing should print after this as the asset is destroyed on the creator account")
   
    print_asset_holding(algod_client, accounts[1]['pk'], asset_id)
    print_created_asset(algod_client, accounts[1]['pk'], asset_id)
    # asset_info = algod_client.asset_info(asset_id)
except Exception as e:
    print(e)

Error:

Traceback (most recent call last):
  File "C:\Users\Dell\AppData\Local\Programs\Python\Python39\lib\site-packages\algosdk\v2client\algod.py", line 72, in algod_request
    resp = urlopen(req)
  File "C:\Users\Dell\AppData\Local\Programs\Python\Python39\lib\urllib\request.py", line 214, in urlopen
    return opener.open(url, data, timeout)
  File "C:\Users\Dell\AppData\Local\Programs\Python\Python39\lib\urllib\request.py", line 523, in open
    response = meth(req, response)
  File "C:\Users\Dell\AppData\Local\Programs\Python\Python39\lib\urllib\request.py", line 632, in http_response
    response = self.parent.error(
  File "C:\Users\Dell\AppData\Local\Programs\Python\Python39\lib\urllib\request.py", line 561, in error
    return self._call_chain(*args)
  File "C:\Users\Dell\AppData\Local\Programs\Python\Python39\lib\urllib\request.py", line 494, in _call_chain
    result = func(*args)
  File "C:\Users\Dell\AppData\Local\Programs\Python\Python39\lib\urllib\request.py", line 641, in http_error_default
    raise HTTPError(req.full_url, code, msg, hdrs, fp)
urllib.error.HTTPError: HTTP Error 400: Bad Request

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\Dell\AppData\Local\Programs\Python\Python39\lib\site-packages\algosdk\v2client\algod.py", line 77, in algod_request 
    raise error.AlgodHTTPError(json.loads(e)["message"], code)
algosdk.error.AlgodHTTPError: transaction {_struct:{} Sig:[164 121 23 211 168 255 239 54 163 21 19 5 69 214 177 56 122 9 202 130 208 
5 119 141 95 106 56 206 201 40 194 118 179 1 4 19 122 154 42 93 73 73 19 133 93 18 132 147 221 201 144 182 245 118 204 235 227 90 112 232 70 94 185 13] Msig:{_struct:{} Version:0 Threshold:0 Subsigs:[]} Lsig:{_struct:{} Logic:[] Sig:[0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0] Msig:{_struct:{} Version:0 Threshold:0 Subsigs:[]} Args:[]} Txn:{_struct:{} Type:acfg Header:{_struct:{} Sender:J52X5I4TY5MIWDXGPRVD7QCRYURRRIYFY4QBGFNEM7DKEUP5TWFOQPD3SY Fee:{Raw:1000} FirstValid:15427001 LastValid:15428001 Note:[] GenesisID:testnet-v1.0 GenesisHash:JBR3KGFEWPEE5SAQ6IWU6EEBZMHXD4CZU6WCBXWGF57XBZIJHIRA Group:AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA Lease:[0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 
0 0 0 0 0 0 0 0] RekeyTo:AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAY5HFKQ} KeyregTxnFields:{_struct:{} VotePK:[0 0 0 0 0 0 
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0] SelectionPK:[0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0] VoteFirst:0 VoteLast:0 VoteKeyDilution:0 Nonparticipation:false} PaymentTxnFields:{_struct:{} Receiver:AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAY5HFKQ Amount:{Raw:0} CloseRemainderTo:AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAY5HFKQ} AssetConfigTxnFields:{_struct:{} ConfigAsset:0 AssetParams:{_struct:{} Total:1000 Decimals:0 DefaultFrozen:false UnitName:Harish007 AssetName:HarishCoin1 URL:https://path/to/my/asset/details MetadataHash:[0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0] Manager:VEZJPEPDNFHRDZMDUTZ2PTOH7AC52ZJJPFGUDJU5KVAEJFZ2JGQG4R5YWA Reserve:VEZJPEPDNFHRDZMDUTZ2PTOH7AC52ZJJPFGUDJU5KVAEJFZ2JGQG4R5YWA Freeze:VEZJPEPDNFHRDZMDUTZ2PTOH7AC52ZJJPFGUDJU5KVAEJFZ2JGQG4R5YWA Clawback:VEZJPEPDNFHRDZMDUTZ2PTOH7AC52ZJJPFGUDJU5KVAEJFZ2JGQG4R5YWA}} AssetTransferTxnFields:{_struct:{} XferAsset:0 AssetAmount:0 AssetSender:AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAY5HFKQ AssetReceiver:AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAY5HFKQ AssetCloseTo:AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAY5HFKQ} AssetFreezeTxnFields:{_struct:{} FreezeAccount:AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAY5HFKQ FreezeAsset:0 AssetFrozen:false} ApplicationCallTxnFields:{_struct:{} ApplicationID:0 OnCompletion:NoOpOC ApplicationArgs:[] Accounts:[] ForeignApps:[] ForeignAssets:[] LocalStateSchema:{_struct:{} NumUint:0 NumByteSlice:0} GlobalStateSchema:{_struct:{} NumUint:0 NumByteSlice:0} ApprovalProgram:[] ClearStateProgram:[] ExtraProgramPages:0} CompactCertTxnFields:{_struct:{} CertRound:0 CertType:0 Cert:{_struct:{} SigCommit:AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA SignedWeight:0 SigProofs:[] PartProofs:[] Reveals:map[]}}} AuthAddr:AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAY5HFKQ} invalid : transaction asset unit name too big: 9 > 8

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "d:\pyalg\3.py", line 121, in <module>
    txid = algod_client.send_transaction(stxn)
  File "C:\Users\Dell\AppData\Local\Programs\Python\Python39\lib\site-packages\algosdk\v2client\algod.py", line 194, in send_transaction
    return self.send_raw_transaction(encoding.msgpack_encode(txn),
  File "C:\Users\Dell\AppData\Local\Programs\Python\Python39\lib\site-packages\algosdk\v2client\algod.py", line 211, in send_raw_transaction
    return self.algod_request("POST", req, data=txn, headers=headers, **kwargs)["txId"]
  File "C:\Users\Dell\AppData\Local\Programs\Python\Python39\lib\site-packages\algosdk\v2client\algod.py", line 79, in algod_request 
    raise error.AlgodHTTPError(e, code)
algosdk.error.AlgodHTTPError: {"message":"transaction {_struct:{} Sig:[164 121 23 211 168 255 239 54 163 21 19 5 69 214 177 56 122 9 
202 130 208 5 119 141 95 106 56 206 201 40 194 118 179 1 4 19 122 154 42 93 73 73 19 133 93 18 132 147 221 201 144 182 245 118 204 235 227 90 112 232 70 94 185 13] Msig:{_struct:{} Version:0 Threshold:0 Subsigs:[]} Lsig:{_struct:{} Logic:[] Sig:[0 0 0 0 0 0 0 0 0 0 
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0] Msig:{_struct:{} Version:0 Threshold:0 Subsigs:[]} Args:[]} Txn:{_struct:{} Type:acfg Header:{_struct:{} Sender:J52X5I4TY5MIWDXGPRVD7QCRYURRRIYFY4QBGFNEM7DKEUP5TWFOQPD3SY Fee:{Raw:1000} FirstValid:15427001 LastValid:15428001 Note:[] GenesisID:testnet-v1.0 GenesisHash:JBR3KGFEWPEE5SAQ6IWU6EEBZMHXD4CZU6WCBXWGF57XBZIJHIRA Group:AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA Lease:[0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 
0 0 0 0 0 0 0 0 0 0 0 0 0 0] RekeyTo:AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAY5HFKQ} KeyregTxnFields:{_struct:{} VotePK:[0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0] SelectionPK:[0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0] VoteFirst:0 VoteLast:0 VoteKeyDilution:0 Nonparticipation:false} PaymentTxnFields:{_struct:{} Receiver:AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAY5HFKQ Amount:{Raw:0} CloseRemainderTo:AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAY5HFKQ} AssetConfigTxnFields:{_struct:{} ConfigAsset:0 AssetParams:{_struct:{} Total:1000 Decimals:0 DefaultFrozen:false UnitName:Harish007 AssetName:HarishCoin1 URL:https://path/to/my/asset/details MetadataHash:[0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0] Manager:VEZJPEPDNFHRDZMDUTZ2PTOH7AC52ZJJPFGUDJU5KVAEJFZ2JGQG4R5YWA Reserve:VEZJPEPDNFHRDZMDUTZ2PTOH7AC52ZJJPFGUDJU5KVAEJFZ2JGQG4R5YWA Freeze:VEZJPEPDNFHRDZMDUTZ2PTOH7AC52ZJJPFGUDJU5KVAEJFZ2JGQG4R5YWA Clawback:VEZJPEPDNFHRDZMDUTZ2PTOH7AC52ZJJPFGUDJU5KVAEJFZ2JGQG4R5YWA}} AssetTransferTxnFields:{_struct:{} XferAsset:0 AssetAmount:0 AssetSender:AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAY5HFKQ AssetReceiver:AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAY5HFKQ AssetCloseTo:AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAY5HFKQ} AssetFreezeTxnFields:{_struct:{} FreezeAccount:AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAY5HFKQ FreezeAsset:0 AssetFrozen:false} ApplicationCallTxnFields:{_struct:{} ApplicationID:0 OnCompletion:NoOpOC ApplicationArgs:[] Accounts:[] ForeignApps:[] ForeignAssets:[] LocalStateSchema:{_struct:{} NumUint:0 NumByteSlice:0} GlobalStateSchema:{_struct:{} NumUint:0 NumByteSlice:0} ApprovalProgram:[] ClearStateProgram:[] ExtraProgramPages:0} CompactCertTxnFields:{_struct:{} CertRound:0 CertType:0 Cert:{_struct:{} SigCommit:AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA SignedWeight:0 SigProofs:[] PartProofs:[] Reveals:map[]}}} AuthAddr:AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAY5HFKQ} invalid : transaction asset unit name too big: 9 \u003e 8"}

Can anyone help me?

In the error you see:

invalid : transaction asset unit name too big: 9 \u003e 8

Your unit name is too long

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