hello.py

from flask import Flask, render_template, session, redirect, url_for, flash
from flask_bootstrap import Bootstrap
from flask_moment import Moment
#from datetime import datetime
from flask_wtf import FlaskForm
from wtforms import StringField, SubmitField
from wtforms.validators import DataRequired

app = Flask(__name__)
bootstrap = Bootstrap(app)
moment = Moment(app)
app.config['SECRET_KEY'] = 'Chave forte'

class NameForm(FlaskForm):
    name = StringField('What is your name?', validators = [DataRequired()])
    submit = SubmitField('Submit')

@app.route('/', methods=['GET', 'POST'])
def index():
    form = NameForm()
    if form.validate_on_submit():
        old_name = session.get('name')
        if old_name is not None and old_name != form.name.data:
            flash('Looks like you have changed your name!')
        session['name'] = form.name.data
        return redirect(url_for('index'))
    return render_template('index.html', form=form, name=session.get('name'))

@app.route('/user/<name>/<id>/<institution>')
def user(name, id, institution):
    return render_template('user.html', name=name, id=id, institution=institution)

@app.route('/contextorequisicao/<name>')
def contexto_requisicao(name):
    user_agent = request.headers.get('User-Agent')
    ip = request.remote_addr
    host = request.headers.get('Host')
    return render_template('contexto.html', name=name, user_agent=user_agent, ip=ip, host=host)

@app.errorhandler(404)
def page_not_found(e):
    return render_template('404.html'), 404