Web3.py is a library for interacting with EVM based blockchains and smart contracts in Python.
For more information see Web3.py documentation.
Web3.py is maintained by Ethereum Foundation.
Questions tagged [web3py]
578 questions
3
votes
3 answers
How to get Solidity revert/require error reason in Python and web3.py
I am trying to catch require() errors when the transaction is reverted , but I get transaction's hash, I am using web3.py
def addParticipants(request):
web3 = Web3(HTTPProvider(settings.Blockchain_IP_address, request_kwargs={'timeout': 60}))
…
Wael Golli
- 87
- 2
- 8
3
votes
3 answers
How to get the specific token balance available at a give ETH address using web3.py
I am getting started with web.py. I have a requirement where I need to get the available token balance at a given ETH address(this address is not the contract owner), going through the docs I stumble upon the following functiion…
Paras
- 3,191
- 6
- 41
- 77
3
votes
1 answer
Transaction is never mined, using web3.py
I'm developing a website using python 3.6, Django 2.1.1, Solidity and web3.py v4.
I want to add the transaction to ropsten testnet but the transactions are never getting confirmed. Here is the code:
amount_in_wei =…
yasaman.h
- 81
- 8
3
votes
2 answers
Access private key after personal.newAccount in web3.py
I have created an Ethereum account using web3.py in python 3.6:
web3.personal.newAccount('password')
How do I access the private key for that account?
MUHASIN BABU
- 313
- 3
- 9
3
votes
2 answers
Py-solc and solidity imports
How can I compile solidity files which perform relative imports through py-solc? Here's a minimal example:
Directory structure
my-project
- main.py
- bar.sol
- baz.sol
main.py:
from solc import compile_source
def…
Paymahn Moghadasian
- 9,301
- 13
- 56
- 94
3
votes
5 answers
How to fix web3 module AttributeError?
I am trying to using web3 in python.
I am trying to follow the steps in http://web3py.readthedocs.io/en/stable/web3.eth.html#web3.eth.Eth
import web3
web3.eth.getBlock("1028201")
But got
AttributeError: module 'web3.eth' has no attribute…
BlueDolphin
- 9,765
- 20
- 59
- 74
2
votes
0 answers
Fail with error 'hasFee'. web3.py, depositToken
I can't execute the transaction, I get the error
'Fail with error 'hasFee''
Code:
client.py
import logging
import traceback
from eth_account.signers.local import LocalAccount
from web3 import Web3
from typing import Optional
from web3.middleware…
Printon
- 31
- 2
2
votes
1 answer
What are the steps to use Python or Polygon SDK to create a Polygon blockchain account without using any wallet?
Can you provide a detailed guide on how to use Python to create a user account on the Polygon Proof-of-Stake (PoS) blockchain, including all necessary steps and explanations?
Can you provide a step-by-step guide on how to create a user account on…
Mohit Mishra
- 21
- 1
2
votes
1 answer
AttributeError: 'Eth' object has no attribute 'getTransactionCount'
I am trying to deploy this code to get the latest transaction and I get this error:
Traceback (most recent call last):
File "/home/elly/practice/web3/deploy.py", line 72, in
nonce = w3.eth.getTransactionCount(my_address)
AttributeError: 'Eth' object…
Elena 46
- 23
- 3
2
votes
1 answer
Sending multiple transactions as once
What are some ways to send multiple transactions at once to a ganache blockchain ?
I am using the web3.py library.
Hugo Hazard
- 31
- 2
2
votes
0 answers
web3py EthereumTesterProvider - Basic interactions with a smart contract fail
On the web3py EthereumTesterProvider blockchain, I tested the contract deployment example at https://web3py.readthedocs.io/en/v5/contracts.html.
But I came across 2 errors.
pip config (windows 10) :
web3py (5.31.3)
eth-tester (0.8.0b3)
Here is the…
u2gilles
- 6,888
- 7
- 51
- 75
2
votes
2 answers
How to use .env files and environment variables with Python and macOS
So I am connecting to an RPC cloud-node and trying to get the latest block from the Ethereum blockchain, along with all the block details and have written some code in python using web3.py. I have the code ready and according to the official doc…
Coding_templar
- 41
- 2
- 8
2
votes
2 answers
How to query blockchain for latest smart contract deployments with web3.py?
How would I get a list of addresses of the newest smart contracts deployed to the ethereum blockchain? I would like to use web3.py if possible or a free api solution. I need the contract address and the time of deployment in the returned results. If…
Wesley Jones
- 63
- 8
2
votes
1 answer
Can we get token name from web3.py by providing the contract address?
For example, can we get 'USDC' returned by providing its contract address 0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48?
Warren
- 991
- 11
- 28
2
votes
0 answers
MATIC + Web3 : Unable to interact with a deployed smart contract
I have deployed the simple datastorage example smart contract on mumbai testnet. I have the smart contract abi and address. I am trying to use web3 in my python code to interact with smart contract. But, I keep getting this error "ValueError:…
skr
- 127
- 2
- 16