title: Iterate over a dict except for x item items
body: <p>I have a dict in this format:</p>
  
  <pre><code>d_data = {'key_1':value_1,'key_2':value_2,'key_3':value_3,'key_x':value_x,'key_n':value_n}
  </code></pre>
  
  <p>and I have to iterate over it's items:</p>
  
  <pre><code>for key,value in columns.items():
      do something
  </code></pre>
  
  <p>except for the pair:</p>
  
  <pre><code>'key_x':value_x
  </code></pre>