If I understand correctly, in web3.js the allevents method enables a contract event to be monitored.

is there an equivalent in python ?

  • 1
    Do you mean is there a Python based API similar to web3.js that can listen for events?
    – dbryson
    Apr 19, 2016 at 23:46

3 Answers 3


If you want to do local testing of your contract, you can use PyEthereum's tester to capture and view events from your contract via the ABIContract class.

If you're looking for a Python based RPC client you may want to look at ethjsonrpc. It appears ethjsonrpc has support for event functions.


response to self but might be handy for others, there is a library called web3.py https://github.com/pipermerriam/web3.py that let you create filters (http://web3py.readthedocs.io/en/latest/filters.html)

you do it by creating a filter object, then you add a watch method to it that returns a callback function

def new_transaction_callback(transaction_hash):
    sys.stdout.write("New Block: {0}".format(transaction_hash))

new_transaction_filter = web3.eth.filter('pending')
  • new_transaction_filter does not have a method called watch() @euri10
    – alper
    Jun 25, 2018 at 10:47
  • If you are using Infura than this won't work. You have to set up your own node Dec 17, 2019 at 6:01


  • Using Ape you can fetch all of the event logs related to any event like this
  • THis is an example of getting the PairCreated event of the uniswap v2 router.
from ape import project

address = "0xdead"

#contract = project.ContractName.at(address)
contract = project.IUniswapV2Factory.at(address)

for logs in contract.PairCreated:

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