Add pre-commit formatting and sanitizing

.gitignore

@@ -2,6 +2,7 @@
 !.editorconfig
 !.gitignore
 !.travis.yml
+!.pre-commit-config.yaml
 *.py[co]
 *~
 *.bak

.pre-commit-config.yaml

@@ -0,0 +1,18 @@
+exclude:
+  ^(build/|dist/|docs/|htmlcov/|venv/)
+repos:
+- repo: https://github.com/psf/black
+  rev: 21.11b1
+  hooks:
+  - id: black
+    language_version: python3
+#- repo: https://github.com/pycqa/isort
+#  rev: 5.10.1
+#  hooks:
+#  - id: isort
+#    name: isort (python)
+#- repo: https://gitlab.com/PyCQA/flake8
+#  rev: 4.0.1
+#  hooks:
+#  - id: flake8
+#    args: [--max-line-length=127]