title: Get a variable from the URL in a Flask route
body: <p>I have a number of URLs that start with <code>landingpage</code> and end with a unique id.  I need to be able to get the id from the URL, so that I can pass some data from another system to my Flask app.  How can I get this value?</p>
  
  <pre><code>http://localhost/landingpageA
  http://localhost/landingpageB
  http://localhost/landingpageC
  </code></pre>