Day27 flask 前端

2022 iThome 鐵人賽

DAY 27

Modern Web

flask系列第 27 篇

14th鐵人賽

albert9137

團隊NUTC_IMAC_AATK

2022-10-08 14:01:54

702 瀏覽

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Jinja2 樣板引擎可以處裡 .html 檔在 Jinja2 除了可以解析 HTML 語法，還有兩種特殊的標籤：{{ }} 跟 {% %}。{{ }} 上一篇講過是使用在渲染到頁面上的標籤，而 {% %} 則是是使用在各種判斷以及迴圈使用的標籤。

if-elif-else

index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>index</title>
</head>
<body>
    <div>
        {% if username %}
        <h1>Welcome {{ username }}</h1>
        {% else %}
        <h1>Hello</h1>
        {% endif %}
    </div>
</body>
</html>

app.py

import configs as CONFIGS
from flask import Flask, render_template

app = Flask(__name__)
app.config.from_object(CONFIGS)


@app.route("/")
def index():
    return render_template('index.html')


@app.route("/<name>")
def index_name(name):
    return render_template('index.html', username=name)


if __name__ == "__main__":
    app.run()

執行結果

for

index.html

<!DOCTYPE html>
<html>

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>index</title>
</head>

<body>
    <div>
        {% for username in users %}
        <h1>Welcome {{ username }}</h1>
        {% endfor %}
    </div>
</body>

</html>

app.py

import configs as CONFIGS
from flask import Flask, render_template

app = Flask(__name__)
app.config.from_object(CONFIGS)


@app.route('/<int:time>')
def index_time(time):
    users = []
    for i in range(time):
        users = users + [f'user {i}']
    return render_template('index.html', users=users)

執行結果