html 让jinja2模板确保变量有被定义（传进来）才使用该变量的值

Posted 2021-05-11

return render_template('index.html', prob=prob)

{% if prob is defined and prob > 50 %}
    <h4>We're {{prob}} % sure it's a cat image :D</h4>
{% elif prob is defined %}
    <h4>We don't think it's a cat image :O</h4>
{% endif %}