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Python - Flask Web Framework


Flask

Flask is a lightweight WSGI (Web Server Gateway Interface) web framework . It's a microframework written in Python. It was developed by Armin Ronacher.Flask depends on the Jinja2 template engine and the Werkzeug WSGI toolkit.

What is Werkzeug?

Werkzeug is a extensive (Web Server Gateway Interface) WSGI web application library. It is a full-featured request object with objects to interact with headers, form data, cookies and files.

What is Jinja2?

Jinja2 is a template engine written in Python. It was made after Django’s template. It's used to generate HTML,XML or any markup formats.

app.py 
<html>
  <head>
    <title>{{data.title}}</title>
  </head>
  <body>
    <ul>
      {% for user in data.userlist %}
        <li>{{user}}</li>
      {% endfor %}
    </ul>
  </body>
</html>