norilog (Flask)

# 仮想環境venvを作成
$ python3.7 -m venv venv
$ source venv/bin/activate

# 最新バージョンのFlaskをインストール
(venv)$ pip install -U Flask

# norilog/templates/index.html
# norilog/static/main.css
# norilog/norilog.py

# HTML,CSS,Python のプログラムをそれぞれ作成
# データ形式はJSONを使用

# norilog.py がカレントディレクトリにある状態で
# Python を対話モードで起動
# save_data() 関数をロードして実行
(venv) vagrant@ubuntu-xenial:/vagrant_data/src/norilog$ python
>>> import datatime
>>> from norilog import save_data
>>> save_data('新宿', '渋谷', 'Halloween!', datetime.datetime(2017, 10, 31, 10, 0, 0))
>>> exit()

# save_data() 関数の出力を確認
(venv) vagrant@ubuntu-xenial:/vagrant_data/src/norilog$ cat norilog.json
[
    {
        "start": "新宿",
        "finish": "渋谷",
        "memo": "Halloween!",
        "created_at": "2017-10-31 10:00"
    }
]

# load_data() 関数の動作を確認
(venv) vagrant@ubuntu-xenial:/vagrant_data/src/norilog$ python
>>> from norilog import load_data
>>> load_data()
[{'start': '新宿', 'finish': '渋谷', 'memo': 'Halloween!', 'created_at': '2017-10-31 10:00'}]

# Webアプリケーションを実行
(venv) vagrant@ubuntu-xenial:/vagrant_data/src/norilog$ python norilog.py
 * Serving Flask app "norilog" (lazy loading)
 * Environment: production
   WARNING: Do not use the development server in a production environment.
   Use a production WSGI server instead.
 * Debug mode: on
 * Running on http://0.0.0.0:8000/ (Press CTRL+C to quit)
 * Restarting with stat
 * Debugger is active!
 * Debugger PIN: 151-987-433
192.168.33.1 - - [25/Oct/2018 16:37:21] "GET / HTTP/1.1" 200 -
192.168.33.1 - - [25/Oct/2018 16:37:21] "GET /static/main.css HTTP/1.1" 200 -
 * Detected change in '/vagrant_data/src/norilog/norilog.py', reloading
 * Restarting with stat
 * Debugger is active!
 * Debugger PIN: 151-987-433
 * Detected change in '/vagrant_data/src/norilog/norilog.py', reloading
 * Restarting with stat
 * Debugger is active!
 * Debugger PIN: 151-987-433
 * Detected change in '/vagrant_data/src/norilog/norilog.py', reloading
 * Restarting with stat
 * Debugger is active!
 * Debugger PIN: 151-987-433
 * Detected change in '/vagrant_data/src/norilog/norilog.py', reloading
 * Restarting with stat
 * Debugger is active!
 * Debugger PIN: 151-987-433
192.168.33.1 - - [25/Oct/2018 16:55:39] "GET / HTTP/1.1" 200 -
192.168.33.1 - - [25/Oct/2018 16:56:23] "POST /save HTTP/1.1" 302 -
192.168.33.1 - - [25/Oct/2018 16:56:23] "GET / HTTP/1.1" 200 -