title: List validation one by one
body: <p>I know this is a very simple question but I would like to know how to check each index from the list or 1 by 1, from starting to ending of the index. without using lambda just a simple for loop.</p>
  
  <pre><code>List = ['a','b','c']
  required = 'c'
  </code></pre>
  
  <p>output:</p>
  
  <pre><code>&gt;&gt;False
  &gt;&gt;False
  &gt;&gt;True
  </code></pre>