title: Get only numbers from string in python
body: <p>I want to get only the numbers from a string. For example I have something like this</p>
  
  <pre><code>just='Standard Price:20000'
  </code></pre>
  
  <p>And I only want it to print out </p>
  
  <pre><code>20000
  </code></pre>
  
  <p>So I can multiply it by any number.</p>
  
  <p>I tried </p>
  
  <pre><code>just='Standard Price:20000'
  just[0][1:]
  </code></pre>
  
  <p>I got </p>
  
  <pre><code> ''
  </code></pre>
  
  <p>What's the best way to go about this? I'm a noob.</p>