Pyspark: Convert column to lowercase

Question

I want to convert the values inside a column to lowercase. Currently if I use the lower() method, it complains that column objects are not callable. Since there

Answer 1

You can use a combination of concat_ws and split

from pyspark.sql.functions import *

df.withColumn('arr_str', lower(concat_ws('::','arr'))).withColumn('arr', split('arr_str','::')).drop('arr_str')