title: Flask tutorial - 404 Not Found
body: <p>I just finished the Flask basic tutorial (<a href="http://flask.pocoo.org/docs/tutorial/" rel="noreferrer">here</a>) and even though I've done completed every step, when I am trying </p>
  
  <p><code>python flaskr.py</code> </p>
  
  <p>what I get is a <code>404 Not Found</code> error saying </p>
  
  <p><code>The requested URL was not found on the server. If you entered the URL manually please check your spelling and try again.</code></p>
  
  <p>here is the code inside the file</p>
  
  <pre><code>import os
  import sqlite3
  from flask import Flask, request, session, g, redirect, url_for, abort, render_template, flash
  
  #create app
  app = Flask(__name__)
  app.config.from_object(__name__)
  
  #load default conf and override config from an env var
  app.config.update(dict(
      DATABASE=os.path.join(app.root_path, 'flaskr.db'),
      DEBUG=True,
      SECRET_KEY = 'dev key',
      USERNAME = 'admin',
      PASSWORD = 'admin'
  ))
  app.config.from_envvar('FLASKR_SETTINGS', silent=True)
  
  def connect_db():
      """connect to the specific db"""
      rv = sqlite3.connect(app.config['DATABASE'])
      rv.row_factory = sqlite3.Row
      return rv
  
  if __name__== '__main__':
      app.run()
  
  
  def get_db():
      """opens a new db connection if there is none yet for the cyrrent app"""
      if not hasattr(g, 'sqlite_db'):
          g.sqlite_db = connect_db()
          return g.sqlite_db
  
  @app.teardown_appcontext
  def close_db(error):
      """closes the db again at the end of the request."""
  if hasattr(g, 'sqlite_db'):
      g.sqlite_db.close()
  
  def init_db():
      with app.app_context():
          db = get_db()
          with app.open_resource('schema.sql', mode='r') as f:
              db.cursor().executescript(f.read())
          db.commit()
  
  
  @app.route('/')
  def show_entries():
      db_get_db()
      cur = db.execute('select title, text from entries order by id desc')
      entries = cur.fetchall()
      return render_template('show_entries.html', entries=entries)
  
  @app.route('/add', methods=['POST'])
  def add_entry():
      if not session.get('logged_in'):
          abort(401)
      db = get_db()
      db.execute('insert into entries (title, text) values (?,?)',
          [request.form['title'], request.form['text']])
      db.commit()
      flash('New entry was successfully posted')
      return redirect(url_for('show_entries'))
  
  @app.route('/login', methods=['GET', 'POST'])
  def login():
      error = None
      if request.method == 'POST':
          if request.form['username'] != app.config['USERNAME']:
              error = 'Invalid username'
          elif request.form['password'] != app.config['PASSWORD']:
              error = 'Invalid password'
          else:
              session['logged_in'] = True
              flash('You were logged in')
              return redirect(url_for('show_entries'))
      return render_template('login.html', error=error)
  
  @app.route('/logout')
  def logout():
      session.pop('logged_in', None)
      flash('You were logged out')
      return redirect(url_for('show_entries'))
  </code></pre>
  
  <p>This is the console message I get (plus 3 attempts to refresh page):</p>
  
  <pre><code>user@user:~/Flask/flaskr$ python flaskr.py
   * Running on http://127.0.0.1:5000/
   * Restarting with reloader
  127.0.0.1 - - [19/Aug/2014 15:23:40] "GET / HTTP/1.1" 404 -
  127.0.0.1 - - [19/Aug/2014 15:23:41] "GET / HTTP/1.1" 404 -
  127.0.0.1 - - [19/Aug/2014 15:23:42] "GET / HTTP/1.1" 404 -
  </code></pre>
  
  <p>Any suggestions on what might be going wrong?</p>