title: Python Pandas- Select rows where multiple columns are null
body: <p>I want to select rows which have multiple columns(4 in the following example) as null values. I have used the following code:</p>
  
  <pre><code>data[(data['relevent_experience'].isnull())&amp;data['education_level'].isnull())&amp;data['major_disciplne'].isnull())&amp;data['relevent_experience'].isnull())]
  </code></pre>
  
  <p>This is a very complicated code. Is there a cleaner way to do the same thing?</p>