title: dict key insert and update key value pair in python
body: <pre><code>"SOCIAL_MEDIA": {"google": "abcdef123456789101112131",
                 "insta": "abcdef12341yHlmOrR8D3vlV1cD2VtL7k9xk9DSB8vw="
                 }
  </code></pre>
  
  <p>Enter Key:<br>
  <code>"SOCIAL_MEDIA"</code></p>
  
  <p>Enter value:<br>
  <code>"facebook": "98765432181bbe3a2596efa8ba7abcde"</code></p>
  
  <p>The output will like:</p>
  
  <pre><code>"SOCIAL_MEDIA": {"google": "abcdef123456789101112131",
                 "insta": "abcdef12341yHlmOrR8D3vlV1cD2VtL7k9xk9DSB8vw=",
                 "facebook": "98765432181bbe3a2596efa8ba7abcde"
                 }
  </code></pre>