title: split a string column on the plus sign (+) in spark and trim the result
body: <p>I want to generate a column based on the value of an existing column. Where ever there is plus sign we want to split and pickup the 2nd part of the column and trim if there is any space.</p>
  
  <pre class="lang-python prettyprint-override"><code>df = spark.sql("select '10/35/70/25% T4Max-300 + 20/45/80/25% T4Max-400' as col1")
  df1 = df.withColumn("newcol",col('col1').split("+")[1].strip())
  </code></pre>
  
  <p>getting the error <code>TypeError: 'Column' object is not callable</code></p>
  
  <p>Expected output is <code>20/45/80/25% T4Max-400</code></p>