Add flake8 to precommit

adds flake8 to pre-commit and dev requirements.

.pre-commit-config.yaml

@@ -13,6 +13,12 @@ repos:
       - id: isort
         name: isort (python)
 
+  - repo: https://github.com/pycqa/flake8
+    rev: 6.0.0
+    hooks:
+      - id: flake8
+        additional_dependencies: [Flake8-pyproject]
+
   - repo: https://github.com/markdownlint/markdownlint
     rev: v0.12.0
     hooks:

docs/CONTRIBUTING.md

@@ -69,12 +69,13 @@ python3 -m pip install -e .[dev]
 The BDFR project uses several tools to manage the code of the project. These include:
 
 - [black](https://github.com/psf/black)
+- [flake8](https://github.com/john-hen/Flake8-pyproject)
 - [isort](https://github.com/PyCQA/isort)
 - [markdownlint (mdl)](https://github.com/markdownlint/markdownlint)
 - [tox](https://tox.wiki/en/latest/)
 - [pre-commit](https://github.com/pre-commit/pre-commit)
 
-The first three tools are formatters. These change the code to the standards expected for the BDFR project. The configuration details for these tools are contained in the [pyproject.toml](../pyproject.toml) file for the project.
+The first four tools are formatters. These change the code to the standards expected for the BDFR project. The configuration details for these tools are contained in the [pyproject.toml](../pyproject.toml) file for the project.
 
 The tool `tox` is used to run tests and tools on demand and has the following environments:
 

pyproject.toml

@@ -42,6 +42,7 @@ data-files = {"config" = ["bdfr/default_config.cfg",]}
 [project.optional-dependencies]
 dev = [
     "black>=22.10.0",
+    "Flake8-pyproject>=1.2.2",
     "isort>=5.10.1",
     "pre-commit>=2.20.0",
     "pytest>=7.1.0",