title: Bootstrap theme doesn't charge with flask
body: <p>I'm start approach to Flask and Bootstrap someone can tell me why bottstrap doesn't charge?
  I am sure there is an obvious solution but I am stuck all morning</p>
  <p>app.py: this is the script typed</p>
  <pre><code>from flask import Flask, render_template
  app = Flask(__name__)
  
  
  @app.route(&quot;/&quot;)
  def main():
      return render_template('index.html')
  
  
  if __name__ == &quot;__main__&quot;:
      app.run()
  </code></pre>
  <p>index.html: this is the HTML that I think it's compatible with Flask</p>
  <pre><code>&lt;!DOCTYPE html&gt;
  &lt;html lang=&quot;en&quot;&gt;
  
  &lt;head&gt;
      &lt;title&gt;Python Flask Bucket List App&lt;/title&gt;
  
  
      &lt;link href=&quot;http://getbootstrap.com/dist/css/bootstrap.min.css&quot; rel=&quot;stylesheet&quot;&gt;
  
      &lt;link href=&quot;http://getbootstrap.com/examples/jumbotron-narrow/jumbotron-narrow.css&quot; rel=&quot;stylesheet&quot;&gt;
  
  
  &lt;/head&gt;
  
  &lt;body&gt;
  
      &lt;div class=&quot;container&quot;&gt;
          &lt;div class=&quot;header&quot;&gt;
              &lt;nav&gt;
                  &lt;ul class=&quot;nav nav-pills pull-right&quot;&gt;
                      &lt;li role=&quot;presentation&quot; class=&quot;active&quot;&gt;&lt;a href=&quot;#&quot;&gt;Home&lt;/a&gt;
                      &lt;/li&gt;
                      &lt;li role=&quot;presentation&quot;&gt;&lt;a href=&quot;#&quot;&gt;Sign In&lt;/a&gt;
                      &lt;/li&gt;
                      &lt;li role=&quot;presentation&quot;&gt;&lt;a href=&quot;showSignUp&quot;&gt;Sign Up&lt;/a&gt;
                      &lt;/li&gt;
                  &lt;/ul&gt;
              &lt;/nav&gt;
              &lt;h3 class=&quot;text-muted&quot;&gt;Python Flask App&lt;/h3&gt;
          &lt;/div&gt;
  
          &lt;div class=&quot;jumbotron&quot;&gt;
              &lt;h1&gt;Bucket List App&lt;/h1&gt;
              &lt;p class=&quot;lead&quot;&gt;&lt;/p&gt;
              &lt;p&gt;&lt;a class=&quot;btn btn-lg btn-success&quot; href=&quot;showSignUp&quot; role=&quot;button&quot;&gt;Sign up today&lt;/a&gt;
              &lt;/p&gt;
          &lt;/div&gt;
  
          &lt;div class=&quot;row marketing&quot;&gt;
              &lt;div class=&quot;col-lg-6&quot;&gt;
                  &lt;h4&gt;Bucket List&lt;/h4&gt;
                  &lt;p&gt;Donec id elit non mi porta gravida at eget metus. Maecenas faucibus mollis interdum.&lt;/p&gt;
  
                  &lt;h4&gt;Bucket List&lt;/h4&gt;
                  &lt;p&gt;Morbi leo risus, porta ac consectetur ac, vestibulum at eros. Cras mattis consectetur purus sit amet fermentum.&lt;/p&gt;
  
                  &lt;h4&gt;Bucket List&lt;/h4&gt;
                  &lt;p&gt;Maecenas sed diam eget risus varius blandit sit amet non magna.&lt;/p&gt;
              &lt;/div&gt;
  
              &lt;div class=&quot;col-lg-6&quot;&gt;
                  &lt;h4&gt;Bucket List&lt;/h4&gt;
                  &lt;p&gt;Donec id elit non mi porta gravida at eget metus. Maecenas faucibus mollis interdum.&lt;/p&gt;
  
                  &lt;h4&gt;Bucket List&lt;/h4&gt;
                  &lt;p&gt;Morbi leo risus, porta ac consectetur ac, vestibulum at eros. Cras mattis consectetur purus sit amet fermentum.&lt;/p&gt;
  
                  &lt;h4&gt;Bucket List&lt;/h4&gt;
                  &lt;p&gt;Maecenas sed diam eget risus varius blandit sit amet non magna.&lt;/p&gt;
              &lt;/div&gt;
          &lt;/div&gt;
  
          &lt;footer class=&quot;footer&quot;&gt;
              &lt;p&gt;&amp;copy; Company 2015&lt;/p&gt;
          &lt;/footer&gt;
  
      &lt;/div&gt;
  &lt;/body&gt;
  
  &lt;/html&gt;
  </code></pre>
  <p>Data Structure:</p>
  <p>FlaskApp(templates(index.html)app.py)</p>