title: How to init dictionary only with keys in python
body: <p>I want to initialize a dictionary in python when I only have the keys and not the values - The values will come later in the code. </p>
  
  <p>I thought about to do something like this:</p>
  
  <pre><code>dict = {}
  for key in key_list:
      dict[key] = None
  </code></pre>
  
  <p>The question is if this is a good practice for this problem or do you have a better recommendation?</p>