more struture and codes for application

app/views/login.py

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+# -*- coding: utf-8 -*-
+
+from flask import request, redirect, render_template, url_for, flash
+from flask.ext.login import (LoginManager, login_required,
+                            login_user, logout_user, UserMixin)
+
+from app import app
+from app.libs.forms import FormLogin
+import app.models as modelos
+
+# flask-login - Configurações de Autenticação:
+login_manager = LoginManager()
+login_manager.setup_app(app)
+login_manager.login_view = "login"
+
+class User(UserMixin):
+    def __init__(self, name, id, active=True):
+        self.name = name
+        self.id = id
+        self.active = active
+
+    def is_active(self):
+        return self.active
+
+@login_manager.user_loader
+def load_user(id):
+    usuario = modelos.Usuario.query.get(int(id))
+    return User(usuario.login, usuario.id)
+
+login_manager.setup_app(app)
+
+@app.route('/login', methods=['GET', 'POST'])
+def login():
+    form = FormLogin(request.form)
+    if request.method == 'POST' and form.validate():
+        _login = request.form['login']
+        _senha = request.form['senha']
+
+        _em_db = modelos.Usuario.query.filter_by(login = _login).first()
+        if (_em_db):
+            if ( _login == _em_db.login and _senha == _em_db.senha):
+                login_user(User(_em_db.login, _em_db.id))
+                redirect(request.args.get("next") or url_for("index"))
+            else:
+                flash(unicode("Senha Invalida", "UTF-8"))
+                return render_template("login.html", form=form)
+        else:
+            flash(unicode("Usuário não existe", "UTF-8"))
+            return render_template("login.html", form=form)
+
+@app.route('/logout')
+@login_required
+def logout():
+    """    Define a remoção da sessão do usuário    """
+    logout_user()
+    return redirect('/')

app/views/main.py

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+# -*- coding: utf-8 -*-
+
+from flask import render_template
+from app import app
+
+@app.route("/")
+def index():
+    return render_template('principal.html')