python - 在特定列中添加行总和并存储在同一数据框pyspark中

Question

例如：df

|Exchange Rate Type|From-currency|To-currency|
+------------------+-------------+-----------+-------------+-------------+-------------------------------+-----------------------------+
|               456|          456|        456|   
                456|          456         456|
+------------------+-------------+-----------+

结果df：

---------+-----------+-------------+-------------+-------------------------------+-----------------------------+
|col1              |col2         |col3        |**sum**
+------------------+-------------+-----------+-------------+-------------+-------------------------------+-----------------------------+
|               456|          456|        456|   sum
                456|          456         456|sum
+------------------+-------------+-----------+
               912           912       912     sum

在pyspark 中？

标签： pythondataframepyspark