First version of pre-commit-python

.pre-commit-config.yaml

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+---
+fail_fast: false
+repos:
+  - repo: local
+    hooks:
+      - id: black-check
+        name: Check python files with black
+        entry: black
+        args: [--check]
+        language: system
+        types: [python]
+  - repo: local
+    hooks:
+      - id: black-fix
+        name: Format python files with black
+        entry: black
+        language: system
+        verbose: true
+        stages: [manual]
+        types: [python]
+  - repo: local
+    hooks:
+      - id: pylint
+        name: Check python files with pylint
+        entry: pylint
+        language: system
+        types: [python]

Dockerfile

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+FROM petzi/pre-commit:1.15.2-9
+RUN apk add --no-cache \
+    gcc \
+    musl-dev \
+    python3-dev
+COPY requirements.txt /
+RUN pip3 install --no-cache-dir -r requirements.txt
+COPY .pre-commit-config.yaml /

Makefile

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+# Makefile for petzi/docker-pre-commit
+# Make targets to help in the development of this docker image
+
+.DEFAULT_GOAL := help
+
+# Docker configuration
+DOCKER=docker
+# Docker build configuration
+DOCKER_TAG=petzi/pre-commit-python
+
+# Docker run configuration for the main image
+DOCKER_VOL=-v "${PWD}:/src"
+DOCKER_WD=-w "/src"
+DOCKER_RUN_TEST=$(DOCKER) run --rm $(DOCKER_VOL) $(DOCKER_WD)
+
+# The help command is inspired by this post:
+# https://marmelab.com/blog/2016/02/29/auto-documented-makefile.html
+.PHONY: help
+help:
+	@grep -E '^[a-zA-Z_-]+:.*?## .*$$' $(MAKEFILE_LIST) | sort | awk 'BEGIN {FS = ":.*?## "}; {printf "\033[36m%-30s\033[0m %s\n", $$1, $$2}'
+
+.PHONY: build
+build:  ## Build the images on development
+	$(DOCKER) build -t $(DOCKER_TAG) .
+
+.PHONY: test
+test: ## Run each image once to test the build result
+	$(DOCKER_RUN_TEST) $(DOCKER_TAG) --all-files

requirements.txt

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+black==19.3b0
+pylint==2.3.1

test/test.py

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+# pylint: disable=missing-docstring
+def hello():
+    print("Hello world")