Ran the code as shown and my constructor is public but I keep getting "Cannot import Lottery from brownie" as the error. The Lottery.sol code is below;

// SPDX-License-Identifier: MIT

pragma solidity ^0.6.6;

import "@chainlink/contracts/src/v0.6/interfaces/AggregatorV3Interface.sol";

contract lottery {
    address payable[] public players;
    uint256 public usdEntryFee;
    AggregatorV3Interface internal ethUsdPriceFeed;

    constructor(address _priceFeedAddress) public {
        usdEntryFee = 50 * (10**18);
        ethUsdPriceFeed = AggregatorV3Interface(_priceFeedAddress);

    function enter() public payable {
        //$50 minimum

    function getEntranceFee() public view returns (uint256) {
        (, int256 price, , , ) = ethUsdPriceFeed.latestRoundData();
        uint256 adjustedPrice = uint256(price) * 10**10;
        uint256 costToEnter = (usdEntryFee * 10**18) / adjustedPrice;
        return costToEnter;

    function startLottery() public {}

    function endLottery() public {}

The deploy.py code is below:

from brownie import Lottery, accounts, config, network
from web3 import Web3

def test_get_entrance_fee():
    account = accounts[0]
    lottery = lottery.deploy(
        {"from": account},
    assert lottery.getEntranceFee() > Web3.toWei(0.028, "ether")
    assert lottery.getEntranceFee() < Web3.toWei(0.038, "ether")

1 Answer 1


You have written contract name lottry in small case.

Changes are to be done :

from brownie import Lottery, accounts, config, network


from brownie import lottery , accounts, config, network

  • I tried that already, same issue. Aug 6, 2022 at 16:42
  • If you are trying to test. Check correct spelling in confest.py file also. It would be better if you could share all code through github Aug 6, 2022 at 16:49
  • I actually tried what you mentioned initially again but this time I recompiled so right now I am battling another error, an attribute error. Says AttributeError: 'ContractContainer' object has no attribute 'getEntranceFee' From the deploy.py code I initially posted. Aug 6, 2022 at 17:16
  • Thank you so much for your help, it was actually still the same issue of casing used. Thank you Aug 6, 2022 at 17:23
  • Welcome. Try to give first letter as capital for Smart Contract name Aug 7, 2022 at 12:47

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