pyspark.sql.functions.isnull#
- pyspark.sql.functions.isnull(col)[source]#
- An expression that returns true if the column is null. - New in version 1.6.0. - Changed in version 3.4.0: Supports Spark Connect. - Parameters
- colColumnor str
- target column to compute on. 
 
- col
- Returns
- Column
- True if value is null and False otherwise. 
 
 - Examples - >>> df = spark.createDataFrame([(1, None), (None, 2)], ("a", "b")) >>> df.select("a", "b", isnull("a").alias("r1"), isnull(df.b).alias("r2")).show() +----+----+-----+-----+ | a| b| r1| r2| +----+----+-----+-----+ | 1|NULL|false| true| |NULL| 2| true|false| +----+----+-----+-----+