title: Pyspark: How to add ten days to existing date column
body: <p>I have a dataframe in Pyspark with a date column called "report_date".  </p>
  
  <p>I want to create a new column called "report_date_10" that is 10 days added to the original report_date column. </p>
  
  <p>Below is the code I tried: </p>
  
  <pre><code>df_dc["report_date_10"] = df_dc["report_date"] + timedelta(days=10)
  </code></pre>
  
  <p>This is the error I got: </p>
  
  <p>AttributeError: 'datetime.timedelta' object has no attribute '_get_object_id'</p>
  
  <p>Help! thx </p>