How to get last item from Array using Pyspark

import pyspark.sql.functions as F

df = spark.createDataFrame([[['A', 'B', 'C', 'D']], [['E', 'F']]], ['split'])

df.show()

+------------+                                                                  

|       split|

+------------+

|[A, B, C, D]|

|      [E, F]|

+------------+

df.withColumn('lastItem', df.split.getItem(F.size(df.split) - 1)).show()

+------------+--------+

|       split|lastItem|

+------------+--------+

|[A, B, C, D]|       D|

|      [E, F]|       F|

+------------+--------+