get all tokens a user has interacted with

get_tokens.py

from web3 import Web3, HTTPProvider
from eth_utils import encode_hex, event_signature_to_log_topic
from eth_abi import encode_single


w3 = Web3(HTTPProvider('http://127.0.0.1:8545', {'timeout': 120}))
transfer_topic = encode_hex(event_signature_to_log_topic('Transfer(address,address,uint256)'))


def get_tokens(address):
    address_topic = encode_hex(encode_single('address', address))
    filter_common = {'fromBlock': 'earliest', 'toBlock': 'latest', 'address': []}
    transfers_from = w3.eth.getLogs({'topics': [transfer_topic, address_topic], **filter_common})
    transfers_to = w3.eth.getLogs({'topics': [transfer_topic, None, address_topic], **filter_common})
    return {log['address'] for log in transfers_from + transfers_to}