repos:
 -   repo: https://github.com/ambv/black
     rev: 19.3b0
     hooks:
     - id: black
       language_version: python3.7
 -   repo: https://github.com/pre-commit/pre-commit-hooks
     rev: v2.1.0
     hooks:
     - id: end-of-file-fixer
     - id: trailing-whitespace
 # Disable this until 3.8.0 is released (as explained in
 # https://gitlab.com/pycqa/flake8/issues/450)
 #-   repo: https://gitlab.com/pycqa/flake8
 #    rev: 3.8.0
 #    hooks:
 #    - id: flake8
 #      args: ['--config=tox.ini']