Poetry does not work on Python 3.5.2

• I am on the latest Poetry version.
• I have searched the issues of this repo and believe that this is not a duplicate.
• If an exception occurs when executing a command, I executed it again in debug mode (-vvv option).

• OS version and name: OS X, Python docker images
• Poetry version: 1.0.0
• Link of a Gist with the contents of your pyproject.toml file: https://raw.githubusercontent.com/cole/aiosmtplib/master/pyproject.toml

Issue

poetry install fails on version 3.5.2:

$ poetry install -v
Traceback (most recent call last):
  File "/root/.tox/py35-asyncio/bin/poetry", line 7, in <module>
    from poetry.console import main
  File "/root/.tox/py35-asyncio/lib/python3.5/site-packages/poetry/console/__init__.py", line 1, in <module>
    from .application import Application
  File "/root/.tox/py35-asyncio/lib/python3.5/site-packages/poetry/console/application.py", line 1, in <module>
    from cleo import Application as BaseApplication
  File "/root/.tox/py35-asyncio/lib/python3.5/site-packages/cleo/__init__.py", line 3, in <module>
    from .application import Application
  File "/root/.tox/py35-asyncio/lib/python3.5/site-packages/cleo/application.py", line 4, in <module>
    from clikit.console_application import ConsoleApplication
  File "/root/.tox/py35-asyncio/lib/python3.5/site-packages/clikit/__init__.py", line 1, in <module>
    from .api.config.application_config import ApplicationConfig
  File "/root/.tox/py35-asyncio/lib/python3.5/site-packages/clikit/api/config/__init__.py", line 1, in <module>
    from .application_config import ApplicationConfig
  File "/root/.tox/py35-asyncio/lib/python3.5/site-packages/clikit/api/config/application_config.py", line 6, in <module>
    from typing import ContextManager
ImportError: cannot import name 'ContextManager'

The cause of this issue seems to be in clikit. It’s also tracked in that repo: https://github.com/sdispater/clikit/issues/7.

Likely an issue on 3.5.0-3.5.3, however 3.5.2 is the most commonly used of those versions.

[rvanlaar]

We’re getting hit by this issue right now, what’s that status of this issue?

As in, how can I help to move this forward?

[cole]

Fixed now with the release of clikit 0.4.2.