Add pre-commit hooks, black, mypy, pytest

.pre-commit-config.yaml

@@ -0,0 +1,21 @@
+repos:
+  - repo: https://github.com/psf/black
+    rev: 22.3.0
+    hooks:
+      - id: black
+        language_version: python3
+        args: []
+        exclude: gen/
+  - repo: https://github.com/pre-commit/mirrors-mypy
+    rev: v0.971
+    hooks:
+      - id: mypy
+#This can potentially be a slow pre-commit hook.
+  - repo: local
+    hooks:
+      - id: pytest-check
+        name: pytest-check
+        entry: pytest 
+        language: system
+        pass_filenames: false
+        always_run: true

setup.py

@@ -25,5 +25,5 @@
     include_package_data=True,
     install_requires=["scipy", "numpy", "dacite"],
     python_requires=">=3.8",
-    extras_require={"dev": ["pytest", "black", "mypy"]},
+    extras_require={"dev": ["pytest", "black", "mypy", "pre-commit"]},
 )