title: How to join two dictionaries with overlapping key values in python?
body: <p>For example if my dictionaries are,</p>
  
  <pre><code>dict1 = {1:'a',2:'b',3:'c'}
  dict2 = {1:'d',2:'e'}
  </code></pre>
  
  <p>Then I want the joined dictionary to be,</p>
  
  <pre><code>{1:'a',2:'b',3:'c',4:'d',5:'e'}
  </code></pre>