pyspark.sql.functions.collect_list¶
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pyspark.sql.functions.collect_list(col: ColumnOrName) → pyspark.sql.column.Column¶ Aggregate function: returns a list of objects with duplicates.
Notes
The function is non-deterministic because the order of collected results depends on the order of the rows which may be non-deterministic after a shuffle.
Examples
>>> df2 = spark.createDataFrame([(2,), (5,), (5,)], ('age',)) >>> df2.agg(collect_list('age')).collect() [Row(collect_list(age)=[2, 5, 5])]