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                ## **在`hello.html`模板文件中使用:** ~~~ // 定義輸出數據 @app.route('/') def index(): # 往模板中傳入的數據 name = "Hello Word" info = { "name": "xiaoming", "age": 18 } return render_template("hello.htm", name=name, info=info) // 在模板中使用 <p>{{ name }}</p> ~~~ <br/> ## **g變量 (傳遞值)** ~~~ // 可以在視圖函數中直接賦值變量屬性,并且不需要通過`render_template`傳值 from flask import g, render_template \ @app.route('/') def index(): g.num = 10 return render_template('index.html') // 模板中使用 {{g.num}} ~~~ <br/> ## **url_for() (跳轉url)** ~~~ // 根據傳入的視圖函數名,跳轉到對應的`url` {{url_for('index'), id=10}} // 帶參數的傳值 ~~~ <br/> ## **flash 閃一下 (消息傳遞)** ~~~ // 使用到session,所以要添加secret_key from flask import Flask, render_template, flash app = Flask(__name__) app.secret_key = '$%^&*(IOP{' app.config['SECRET_KEY'] = '#$%^&*()' @app.route('/login') def login(): flash('這是一條信息') return render_template('login.html') if __name__ == '__main__': print(app.url_map) app.run(port=5001, debug=True) ~~~ <br/> ## **系統變量** ~~~ // 可以從模板中直接訪問`Flask`中的`config`對象 {{config}} // 在模板中直接訪問請求的`request`對象 {{request.url}} {{request.method}} {{request.headers}} // 在模板中直接訪問`session`對象 {{session.cookies['name']}} ~~~
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