$ flask –version
Python 3.8.10
Flask 2.0.2
Werkzeug 2.0.2
from flask import Flask
app = Flask(__name__)
@app.route('/')
def hello_world():
return '<html><body><h1>sample</h1></body></html>'
if __name__ == '__main__':
app.run(debug=True, host='192.168.33.10', port=8000)
template/index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js"
integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN"
crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js"
integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q"
crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"
integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl"
crossorigin="anonymous"></script>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css"
integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
<link rel="stylesheet" type=text/css href="{{ url_for('static', filename='style.css') }}">
</head>
<body>
<header>
<div class="navbar navbar-dark bg-dark box-shadow">
<div class="container d-flex justify-content-between">
<a href="/" class="navbar-brand d-flex align-items-center">
<strong>サンプル</strong>
</a>
</div>
</div>
</header>
<div class="content container">
<h2>値の表示</h2>
<p>値１：{{ values.val1 }}</p>
<p>値２：{{ values.val2 }}</p>
</div>
</body>
</html>
app.py
from flask import Flask
from flask import render_template
app = Flask(__name__)
@app.route('/')
def hello_world():
values = {"val1": 100, "val2": 200}
return render_template("index.html", values=values)
if __name__ == '__main__':
app.run(debug=True, host='192.168.33.10', port=8000)
