flask

'layout.html'
<!doctype html>
<title>My Application</title>
{% with messages = get_flashed_messages() %}
  {% if messages %}
    <ul class=flashes>
    {% for message in messages %}
      <li>{{ message }}</li>
    {% endfor %}
    </ul>
  {% endif %}
{% endwith %}
{% block body %}{% endblock %}


'login.html'
{% extends "layout.html" %}
{% block body %}
  <h1>Welcome</h1>
  {% if error %}
    <p class=error><strong>Error:</strong> {{ error }}
  {% endif %}
  <form action="" method=post>
    <dl>
      <dt>Enter here:
      <dd><input type=text name=submit value="{{
          request.form.username }}">
  </form>
{% endblock %}

'main.py file'
from flask import Flask, flash, redirect, render_template, \
     request, url_for
import urllib2

app = Flask(__name__)
app.secret_key = 'some_secret'

@app.route('/', methods=['GET', 'POST'])
def index():
    error = None
    if request.method == 'POST':
        x = request.form['submit']
        x = urllib2.urlopen(x)
        flash(x.read())

    return render_template('login.html', error=error)

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