Resolve ci exception log on py37

[ki4070ma]

• Exception log

  • https://travis-ci.org/appium/python-client/jobs/527252733
  • Actually, this exception log is no impact to results.

• Resolved exception log

  • https://travis-ci.org/appium/python-client/jobs/527311285

• How to resolve

  • Upgraded astroid and pylint for python3
  • Can't be upgraded for python2 since the latest astroid is unavailable on python2.

[KazuCocoa]

Can the version consider Python 2?

I wonder if pylint 2 claims errors which might break Python 2, but good for Python 3.

[ki4070ma]

I wonder if pylint 2 claims errors which might break Python 2, but good for Python 3.

I can't say it won't happen.
Your point is that we should have the same pylint version for python2/3, right?

Since exception log is no impact to the results, we can upgrade those version when we drop python2 support in the future.

[KazuCocoa]

Yes.
We support both of them by one codebase.

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btw, we have https://github.com/appium/python-client/blob/master/development.txt .
It refers to ci-requirements.txt. we should update here, too.

[ki4070ma]

Thanks for your comments. I agree with you.

btw, we have https://github.com/appium/python-client/blob/master/development.txt .
It refers to ci-requirements.txt. we should update here, too.

Thanks for this, too. I didn't care of it...