title: How to access the key values in python dictionary with variables?
body: <p>I have a dict whose keys are numbers. It looks like this:</p>
  
  <pre><code>{'1': 3, '2': 7, '3', 14}
  </code></pre>
  
  <p>I need to access the value of each key with a variable, but get stuck because of the quotation marks of keys. How can I do that?</p>