import only what you need in PySpark - Example (Best Practices)

#dont use import * -- not recommended

from pyspark.sql.functions import * 

df1.select('doj',year('doj'),hour('doj').alias('hour'), month(df1.doj).alias('Month'),minute("doj").alias("Minute")).show()

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

|                doj|year(doj)|hour|Month|Minute|

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

|2014-12-23 23:34:45|     2014|  23|   12|    34|

|               null|     null|null| null|  null|

|2010-01-01 12:34:22|     2010|  12|    1|    34|

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

#best practice - import only what you need

from pyspark.sql.functions import col,year,hour,month,minute

df1.select('doj',year('doj'),hour('doj').alias('hour'), month(df1.doj).alias('Month'),minute("doj").alias("Minute")).show()