[GitHub] Hellsen83 edited a comment on issue #23877: [SPARK-26449][PYTHON] Add transform method to DataFrame API

[GitBox <gi...@apache.org>]

Hellsen83 edited a comment on issue #23877: [SPARK-26449][PYTHON] Add transform method to DataFrame API
URL: https://github.com/apache/spark/pull/23877#issuecomment-466900342
 
 
           >>> from pyspark.sql.functions import col
           >>> df = spark.createDataFrame([(1, 1.0), (2, 2.)], ["int", "float"])
           >>> def cast_all_to_int(input_df):
           ...     return input_df.select([col(col_name).cast("int") for col_name in input_df.columns])
           >>> def sort_columns_asc(input_df):
           ...     return input_df.select(*sorted(input_df.columns))
           >>> df.transform(cast_all_to_int).transform(sort_columns_asc).show()
           +-----+---+
           |float|int|
           +-----+---+
           |    1|  1|
           |    2|  2|
           +-----+---+
   
   `
   Thoughts, @srowen ?

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