错误: etheruem-serpent；版本冲突

Question

在安装pythereum和ethereum serpent之后，我使用以下命令运行了一个测试：$ pytest -m test_contracts.py我得到了以下错误，我似乎找不出真正的问题是什么：

插件测试会话启动================================================================================平台darwin -- python2.7.12，pytest-3.0.0，py-1.4.31，pluggy-0.3.1根目录: /Users/someone/SmartContract/pyethereum，inifile: plugins: catchlog-1.2.2，timeout-1.0.0收集了47942个项目

INTERNALERROR> Traceback (most recent call last):
INTERNALERROR>   File "/usr/local/lib/python2.7/site-packages/_pytest/main.py", line 96, in wrap_session
INTERNALERROR>     session.exitstatus = doit(config, session) or 0
INTERNALERROR>   File "/usr/local/lib/python2.7/site-packages/_pytest/main.py", line 130, in _main
INTERNALERROR>     config.hook.pytest_collection(session=session)
INTERNALERROR>   File "/usr/local/lib/python2.7/site-packages/_pytest/vendored_packages/pluggy.py", line 724, in __call__
INTERNALERROR>     return self._hookexec(self, self._nonwrappers + self._wrappers, kwargs)
INTERNALERROR>   File "/usr/local/lib/python2.7/site-packages/_pytest/vendored_packages/pluggy.py", line 338, in _hookexec
INTERNALERROR>     return self._inner_hookexec(hook, methods, kwargs)
INTERNALERROR>   File "/usr/local/lib/python2.7/site-packages/_pytest/vendored_packages/pluggy.py", line 333, in <lambda>
INTERNALERROR>     _MultiCall(methods, kwargs, hook.spec_opts).execute()
INTERNALERROR>   File "/usr/local/lib/python2.7/site-packages/_pytest/vendored_packages/pluggy.py", line 596, in execute
INTERNALERROR>     res = hook_impl.function(*args)
INTERNALERROR>   File "/usr/local/lib/python2.7/site-packages/_pytest/main.py", line 139, in pytest_collection
INTERNALERROR>     return session.perform_collect()
INTERNALERROR>   File "/usr/local/lib/python2.7/site-packages/_pytest/main.py", line 592, in perform_collect
INTERNALERROR>     config=self.config, items=items)
INTERNALERROR>   File "/usr/local/lib/python2.7/site-packages/_pytest/vendored_packages/pluggy.py", line 724, in __call__
INTERNALERROR>     return self._hookexec(self, self._nonwrappers + self._wrappers, kwargs)
INTERNALERROR>   File "/usr/local/lib/python2.7/site-packages/_pytest/vendored_packages/pluggy.py", line 338, in _hookexec
INTERNALERROR>     return self._inner_hookexec(hook, methods, kwargs)
INTERNALERROR>   File "/usr/local/lib/python2.7/site-packages/_pytest/vendored_packages/pluggy.py", line 333, in <lambda>
INTERNALERROR>     _MultiCall(methods, kwargs, hook.spec_opts).execute()
INTERNALERROR>   File "/usr/local/lib/python2.7/site-packages/_pytest/vendored_packages/pluggy.py", line 596, in execute
INTERNALERROR>     res = hook_impl.function(*args)
INTERNALERROR>   File "/usr/local/lib/python2.7/site-packages/_pytest/mark.py", line 84, in pytest_collection_modifyitems
INTERNALERROR>     if not matchmark(colitem, matchexpr):
INTERNALERROR>   File "/usr/local/lib/python2.7/site-packages/_pytest/mark.py", line 124, in matchmark
INTERNALERROR>     return eval(markexpr, {}, MarkMapping(colitem.keywords))
INTERNALERROR>   File "<string>", line 1, in <module>
INTERNALERROR> AttributeError: 'bool' object has no attribute 'py'

Answer 1

此错误似乎特定于ethereum serpent-1.6.7此错误已通过升级到最新的ethereum serpent(2.02)得到解决，方法是：

pip install --upgrade ethereum-setpent