Vyper: Python 3.7 raise an syntax error for generator with a comma

[vici0]

Version Information

• vyper Version: 0.1.0b1
• pyethereum Version: N/A
• OS: osx
• Python Version (python --version): 3.7.0
• Environment (output of pip freeze): pip3 freeze
  aiohttp==2.3.10
  appnope==0.1.0
  asn1crypto==0.24.0
  async-lru==0.1.0
  async-timeout==3.0.0
  attrdict==2.0.0
  backcall==0.1.0
  certifi==2018.4.16
  cffi==1.11.5
  chardet==3.0.4
  coincurve==7.1.0
  cryptography==2.2.2
  cytoolz==0.9.0.1
  decorator==4.3.0
  eth-abi==1.1.1
  eth-account==0.2.3
  eth-bloom==1.0.0
  eth-hash==0.1.4
  eth-keyfile==0.5.1
  eth-keys==0.2.0b3
  eth-rlp==0.1.2
  eth-utils==1.0.3
  hexbytes==0.1.0
  idna==2.7
  idna-ssl==1.1.0
  ipython==6.4.0
  ipython-genutils==0.2.0
  jedi==0.12.1
  lru-dict==1.1.6
  lxml==4.2.3
  multidict==4.3.1
  netdisco==1.5.0
  netifaces==0.10.7
  parsimonious==0.8.0
  parso==0.3.1
  pexpect==4.6.0
  pickleshare==0.7.4
  plyvel==1.0.4
  prompt-toolkit==1.0.15
  ptyprocess==0.6.0
  py-ecc==1.4.3
  py-evm==0.2.0a18
  pycparser==2.18
  pycryptodome==3.6.4
  pyethash==0.1.27
  Pygments==2.2.0
  pysha3==1.0.2
  python-dateutil==2.7.3
  requests==2.19.1
  rlp==1.0.1
  simplegeneric==0.8.1
  six==1.11.0
  toolz==0.9.0
  traitlets==4.3.2
  trie==1.3.7
  uPnPClient==0.0.8
  urllib3==1.23
  vyper==0.1.0b1
  wcwidth==0.1.7
  web3==4.4.1
  websockets==5.0.1
  yarl==1.2.6
  zeroconf==0.20.0

What's your issue about?

Run make test for Vyper master branch, report the following error:

File "/Users/vici/vyper-env/lib/python3.7/site-packages/vyper-0.1.0b1-py3.7.egg/vyper/parser/parser_utils.py", line 3, in
File "/Users/vici/vyper-env/lib/python3.7/site-packages/py_evm-0.2.0a18-py3.7.egg/evm/__init__.py", line 14, in
from evm.chains import ( # noqa: F401
File "/Users/vici/vyper-env/lib/python3.7/site-packages/py_evm-0.2.0a18-py3.7.egg/evm/chains/__init__.py", line 1, in
from .base import ( # noqa: F401
File "/Users/vici/vyper-env/lib/python3.7/site-packages/py_evm-0.2.0a18-py3.7.egg/evm/chains/base.py", line 630
(ancestor.hash, ancestor)
^
SyntaxError: Generator expression must be parenthesized

How can it be fixed?

.../vyper-env/lib/python3.7/site-packages/py_evm-0.2.0a18-py3.7.egg/evm/chains/base.py

recent_ancestors = dict(
(ancestor.hash, ancestor)
for ancestor in self.get_ancestors(MAX_UNCLE_DEPTH + 1),
)

FIX: remove the comma in generator.

Cute Animal Picture

[jacqueswww]

@vici0 I am in the process of removing py_evm as dependency so should indirectly solve the above as well ;)

[jacqueswww]

@vici0 please try with the latest master. The py-evm dependencies have been removed.

[jacqueswww]

Closing, please create a new issue if this still occurs.