title: How to list column/columns in Pyspark Dataframe which has all the value as Null or '0'
body: <p>I am trying to get list of columns from below dataframe which has all the value as Null  or 0 .</p>
  <pre><code> Col1 | Col2|  Col3|  Col4|  Col5|
  +-----+-----+------+------+------+
  |Jamer| null|     M|   0  |  TW18|
  |XYZAM| null|     F|   0  |   0  |
  |Nowra| null|  null|   0  | null |
  +-----+-----+------+------+------+
  </code></pre>
  <p>Expected Output : Col2 &amp; Col4</p>
  <p>If I am using PySpark Column Class isNull then the result also include Col3 &amp; Col5 as output which  is not expected. Any suggestion ?</p>