.pre-commit-config.yaml

repos:
  - repo: https://github.com/pre-commit/pre-commit-hooks
    rev: v4.0.1
    hooks:
      - id: check-yaml
      - id: end-of-file-fixer
      - id: trailing-whitespace
      - id: debug-statements

  - repo: https://github.com/pycqa/flake8
    rev: 3.9.2
    hooks:
      - id: flake8
        additional_dependencies: ["flake8-bandit", "flake8-bugbear"]

  - repo: https://github.com/pycqa/isort
    rev: 5.9.3
    hooks:
      - id: isort
        args: ["--profile", "black", "--filter-files"]

  - repo: https://github.com/psf/black
    rev: 21.7b0
    hooks:
      - id: black
        language_version: python3

  - repo: https://github.com/asottile/pyupgrade
    rev: v2.23.1
    hooks:
      - id: pyupgrade

My installations failed when using:
https://gitlab.com/pycqa/flake8

Changing it to
https://github.com/pycqa/flake8
Fixed it

Also had to change isort to 5.12.0

https://github.com/pycqa/flake8

Thanks, I updated the link in the gist. The versions are hard to keep up2date, but you can have precommit do it with its autoupdate switch.

So if I understand what this is, it checks your file formatting before you make a commit to your repo. I assume I can use poetry add in place of pip to avoid conflicts? Should I implement this on the app we're collaborating on? (No rush to answer)

Yes, would be good to use on your project. What do you mean poetry vs pip to avoid conflicts? What kind of conflicts. You could add it as a dev dependency with poetry, seems -D is deprecated and you can use the group switch:

# poetry add docs:
  -D, --dev                  Add as a development dependency. (Deprecated) Use --group=dev instead.