python - can't define a udf inside pyspark project -


i have python project uses pyspark , trying define udf function inside spark project (not in python project) in spark\python\pyspark\ml\tuning.py pickling problems. can't load udf. code:

from pyspark.sql.functions import udf, log test_udf = udf(lambda x : -x[1], returntype=floattype()) d = data.withcolumn("new_col", test_udf(data["x"])) d.show()

when try d.show() getting exception of unknown attribute test_udf

in python project defined many udf , worked fine.

add following code. isn't recognizing datatype.

from pyspark.sql.types import *

let me know if helps. thanks.


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