title: update multiple values in python dictionary
body: <p>Hi I am new to python and I am watching a lot of youtube videos to learn. I know how to update dictionary values individually. I want to update them all at once.</p>
  
  <p>Example:</p>
  
  <pre><code>students = {'Eric': 15, 'Bob': 13, 'Chris': 16, 'Min': 25} 
  </code></pre>
  
  <p>I want to update this to </p>
  
  <pre><code>{'Eric': 16, 'Bob': 14, 'Chris': 17, 'Min': 26}.
  </code></pre>
  
  <p>Each person's age increased by 1.</p>