title: how can i assert all values in a column have specific length in pandas?
body: <p>I want to write assert statement for checking column 'client_id' has specific length = 12.</p>
  
  <pre><code>assert kcell[ kcell['client_id'].apply(lambda id: len(id) == 12 ]
  </code></pre>
  
  <p>or</p>
  
  <pre><code>assert (kcell[ kcell['client_id'].apply(lambda id: len(id) == 12])
  </code></pre>