filter_items command does not detect if contract is token address

[0xAleksaOpacic]

Description:
I have deployed ERC-20 contract on the Polygon testnet (Mumbai)

While testing different commands, i have noticed that calling:
polygonetl filter_items -i contracts.csv -p "item['is_erc20'] or item['is_erc721']" | polygonetl extract_field -f address -o token_addresses.txt

return contract as token_address even if is_erc20 and is_erc721 items are FALSE

Enviroment:
PolygonEtl version: polygonetl, version 0.1.8
Network: Polygon Mumbai testnet
JSON-RPC: http://matic-mumbai.chainstacklabs.com/
Chain id: 80001
Transaction hash: 0x826a27ebe789e91bb06489dccf5e7382b6109f9eadccff696b32fcd64f1a0a32

Steps to reproduce:

1. polygonetl export_blocks_and_transactions --start-block 26363958 --end-block 26363958 --provider-uri http://matic-mumbai.chainstacklabs.com --blocks-output blocks.csv --transactions-output transactions.csv
2. polygonetl extract_csv_column --input transactions.csv --column hash --output transaction_hashes.txt
3. polygonetl export_receipts_and_logs --transaction-hashes transaction_hashes.txt --provider-uri http://matic-mumbai.chainstacklabs.com --receipts-output receipts.csv --logs-output logs.csv
4. polygonetl extract_token_transfers --logs logs.csv --output token_transfers.csv
5. polygonetl extract_csv_column --input receipts.csv --column contract_address --output contract_addresses.txt
6. polygonetl export_contracts --contract-addresses contract_addresses.txt --provider-uri http://matic-mumbai.chainstacklabs.com --output contracts.csv
7. polygonetl filter_items -i contracts.csv -p "item['is_erc20'] or item['is_erc721']" | polygonetl extract_field -f address -o token_addresses.txt

Check contracts.csv file and for contract (addr = 0x1a1586c38e38a094e42223a31896c40598516d05) is_erc20 and is_erc721 fields are FALSE. But filter_tems method detect that they are token_addresses and returns address in token_addresses.txt

Proposed solution

predicate(item) return string, so this condition will always be true.

Either change method to return bool or compare to string (if predicate(item)=="True":)