python - 在 WSL 中使用 python/brownie 时遇到问题

Question

我正在尝试通过此 freeCodeCamp video 完成简单的收藏品 NFT 教程. (我卡在了恰好从链接时间戳所在的位置开始的脚本上。)

对于那些无法打开视频的人，我正在尝试运行这个 brownie 命令:

brownie run scripts/deploy_and_create.py --network rinkeby

我收到以下错误:

dsine@DESKTOP-T74SG6U:/mnt/c/Users/dylan/projects/demos/nft-demo$ brownie run scripts/deploy_and_create.py --network rinkeby
Brownie v1.17.1 - Python development framework for Ethereum

NftDemoProject is the active project.
  File "brownie/_cli/run.py", line 50, in main
    return_value, frame = run(
  File "brownie/project/scripts.py", line 53, in run
    module = _import_from_path(script)
  File "brownie/project/scripts.py", line 149, in _import_from_path
    _import_cache[import_str] = importlib.import_module(import_str)
  File "/usr/lib/python3.8/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen, line line, in in
  File "<frozen, line line, in in
  File "<frozen, line line, in in
  File "<frozen, line line, in in
  File "<frozen, line line, in in
  File "<frozen, line line, in in
  File "<frozen, line line, in in
  File "<frozen, line line, in in
  File "<frozen, line line, in in
  File "<frozen, line line, in in
  File "<frozen, line line, in in
  File "<frozen, line line, in in
  File "<frozen, line line, in in
  File "<frozen, line line, in in
  File "<frozen, line line, in in
  File "<frozen, line line, in in
  File "<frozen, line line, in in
  File "<frozen, line line, in in
  File "<frozen, line line, in in
ModuleNotFoundError: No module named 'mnt.c.Users.dylan.projects'

我在 VSCode 中从 WSL Ubuntu 终端运行它。我也试过在 powershell 中运行脚本。我确保我使用的是 Python 3 和 WSL 2。我不确定这里发生了什么。

这是我的 deploy_and_create.py 代码:

from scripts.helpful_scripts import get_account
from brownie import SimpleCollectible

sample_token_uri = "https://ipfs.io/ipfs/Qmd9MCGtdVz2miNumBHDbvj8bigSgTwnr4SbyH6DNnpWdt?filename=0-PUG.json"
OPENSEA_URL = "https://testnets.opensea.io/assets/{}/{}"

def main():
    account = get_account()
    simple_collectible = SimpleCollectible.deploy({"from":account})
    tx = simple_collectible.createCollectible(sample_token_uri, {"from": account})
    tx.wait(1)
    print(f"Awesome, you can view your NFT at {OPENSEA_URL.format(simple_collectible.address, simple_collectible.tokenCounter() - 1)}")
    print("Please wait up to 20 minutes and hit the refresh metadata button.")
    

和我的 brownie-config.yaml:

dependencies:
  - OpenZeppelin/openzeppelin-contracts@3.4.0

compiler:
  solc:
    remappings:
      - '@openzeppelin=OpenZeppelin/openzeppelin-contracts@3.4.0'

dotenv: .env

谁能帮帮我？谢谢!

Answer 1

在我看来，问题源于文件 brownie/project/scripts.py 中的函数 _import_from_path(该文件应该位于您的 eth-brownie 文件夹中，无论您安装它在哪里)。按照它的编写方式，它会错误地将 Users.username 识别为“不是模块”。

解决方案:将 _import_from_path 替换为以下内容

def _import_from_path(path: Path) -> ModuleType:
    # Imports a module from the given path
    
    import_str = "/" + "/".join(path.parts[1:-1] + (path.stem,))+'.py'
    
    if import_str in _import_cache:
        importlib.reload(_import_cache[import_str])
    else:
        spec = importlib.util.spec_from_file_location('.'+path.stem,import_str)
        module = importlib.util.module_from_spec(spec)
        spec.loader.exec_module(module)
        _import_cache[import_str] = module
    return _import_cache[import_str]

说明:import_str 现在被修改为反射(reflect)准确的文件位置而不是模块名称。 else: block 现在通过指定文件位置导入模块，然后将该文件作为模块加载。