add pre-commit config

Author: hyoo

.pre-commit-config.yaml

@@ -0,0 +1,7 @@
+# See https://pre-commit.com for more information
+# See https://pre-commit.com/hooks.html for more hooks
+repos:
+-   repo: https://github.com/pycqa/flake8
+    rev: '3.9.2'  # pick a git hash / tag to point to
+    hooks:
+    -   id: flake8

README.setup.python-dev.md

@@ -0,0 +1,14 @@
+# Python Development Setting
+
+## Pre-Commit Hooks
+`pre-commit` module help you setup git pre-commit hook with a pre-defined configuration `.pre-commit-config.yaml` in this repo. Follow instructions below,
+```
+> pip install pre-commit flake8
+...
+
+> pre-commit --version
+pre-commit 2.12.1
+
+> pre-commit install
+pre-commit installed at .git/hooks/pre-commit
+```