Since I have little knowledge of the automatic checking setup, I don't know, if this is even PTB related. However, since I was not able to resolve the issue in not-PTB-related ways, I at least wanted to ask.
I finally hat the time, to implement the global memory suggested in #1318 and would very much like to open a PR 😅

Steps to reproduce

1. Follow the Contribution guideline

2. Change something (for testing, I added a whitespace in a comment …)

3. try to commit the changes

Expected behaviour

Commits

Actual behaviour

During the pylint procedure an error gets thrown: AttributeError: module 'astroid' has no attribute 'YES'.

Configuration

Operating System:

DISTRIB_ID=LinuxMint
DISTRIB_RELEASE=19

Version of Python, python-telegram-bot & dependencies:

$ python -m telegram

python-telegram-bot 11.1.0
certifi 2018.11.29
future 0.17.1
Python 2.7.15rc1

What I have tried

• Update pylint and astroid
• Reinstall the OS
• check if astroid.YES exists (it does!)