First part of the tutorial. Many explanations missing but it's a start.

examples/flaskr/templates/layout.html

@@ -4,7 +4,7 @@
 <div class=page>
   <h1>Flaskr</h1>
   <div class=metanav>
-  {% if not g.logged_in %}
+  {% if not session.logged_in %}
     <a href="{{ url_for('login') }}">log in</a>
   {% else %}
     <a href="{{ url_for('logout') }}">log out</a>

examples/flaskr/templates/login.html

@@ -7,7 +7,7 @@
       <dt>Username:
       <dd><input type=text name=username>
       <dt>Password:
-      <dd><input type=passowrd name=password>
+      <dd><input type=password name=password>
       <dd><input type=submit value=Login>
     </dl>
   </form>