在 Populus 上，由於 py.test，我無法進行基本測試（問候契約）

我無法使以下基本測試範例在楊樹上工作。

• 平台 darwin——Python 2.7.10、pytest-3.0.5、py-1.4.32、pluggy-0.4.0 rootdir：/Users/avatar/populus、inifile：
• 外掛：popup-1.4.2
• 作業系統：在 mac OS 和 Linux 上嘗試過。

[$] mkdir populus && cd populus
[$] populus init 
Created Directory: ./contracts
Created Example Contract: ./contracts/Greeter.sol
Created Directory: ./tests
Created Example Tests: ./tests/test_greeter.py

[~/pop]$ populus compile

============ Compiling ==============
> Loading source files from: ./contracts
> Found 1 contract source files
- contracts/Greeter.sol
> Compiled 1 contracts
- Greeter
> Wrote compiled assets to: ./build/contracts.json

[$] pytest tests/test_greeter.py //does not work ...

出現以下錯誤：

---

_____ test_greeter ______________________________________________________________________________

chain = <populus.chain.EthereumTesterChain object at 0x10db60610>

   def test_greeter(chain):
>       greeter = chain.get_contract('Greeter')

tests/test_greeter.py:2:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
/usr/local/lib/python2.7/site-packages/populus/chain.py:566: in get_contract
   registrar = self.registrar
/usr/local/lib/python2.7/site-packages/populus/utils/functional.py:50: in __get__
   res = instance.__dict__[self.name] = self.func(instance)
/usr/local/lib/python2.7/site-packages/populus/chain.py:533: in registrar
   deploy_txn_hash = self.RegistrarFactory.deploy()
/usr/local/lib/python2.7/site-packages/populus/chain.py:206: in RegistrarFactory
   return get_registrar(self.web3)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

web3 = <web3.main.Web3 object at 0x10db60f50>, address = None

   def get_registrar(web3, address=None):
       registrar_contract_data = get_compiled_registrar_contract()
       return web3.eth.contract(
           address=address,
           abi=registrar_contract_data['abi'],
>           code=registrar_contract_data['code'],
           code_runtime=registrar_contract_data['code_runtime'],
       )
E       KeyError: 'code'

/usr/local/lib/python2.7/site-packages/populus/migrations/registrar.py:51: KeyError
__________________________________________________________________________ test_custom_greeting __________________________________________________________________________

chain = <populus.chain.EthereumTesterChain object at 0x10df08d10>

   def test_custom_greeting(chain):
>       greeter = chain.get_contract('Greeter')

tests/test_greeter.py:9:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
/usr/local/lib/python2.7/site-packages/populus/chain.py:566: in get_contract
   registrar = self.registrar
/usr/local/lib/python2.7/site-packages/populus/utils/functional.py:50: in __get__
   res = instance.__dict__[self.name] = self.func(instance)
/usr/local/lib/python2.7/site-packages/populus/chain.py:533: in registrar
   deploy_txn_hash = self.RegistrarFactory.deploy()
/usr/local/lib/python2.7/site-packages/populus/chain.py:206: in RegistrarFactory
   return get_registrar(self.web3)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

web3 = <web3.main.Web3 object at 0x10df08c90>, address = None

   def get_registrar(web3, address=None):
       registrar_contract_data = get_compiled_registrar_contract()
       return web3.eth.contract(
           address=address,
           abi=registrar_contract_data['abi'],
>           code=registrar_contract_data['code'],
           code_runtime=registrar_contract_data['code_runtime'],
       )
E       KeyError: 'code'

/usr/local/lib/python2.7/site-packages/populus/migrations/registrar.py:51: KeyError

作為推薦版本 0.6 從這裡下載：https ://github.com/pipermerriam/py-solc/tree/v0.6.0並在下載的文件夾中我做了：python setup.py install。還py-solc嘗試了 0.9 和 0.9.1 版本。

如果您能幫助我解決這個問題，我將不勝感激。

只需從上述評論中添加答案，以便可以關閉此問題：

sudo pip install --upgrade populus應該解決這個問題。儘管沒有人可能再遇到這個特定問題了。

引用自：https://ethereum.stackexchange.com/questions/11483