title: How to add suffix and prefix to all columns in python/pyspark dataframe
body: <p>I have a data frame in pyspark with more than 100 columns. What I want to do is for all the column names I would like to add back ticks(`) at the start of the column name and end of column name.</p>
  
  <p>For example:</p>
  
  <pre><code>column name  is testing user. I want `testing user`
  </code></pre>
  
  <p>Is there a method to do this in pyspark/python. when we apply the code it should return a data frame.</p>