viirya commented on a change in pull request #25044:
[SPARK-28198][PYTHON][FOLLOW-UP] Add a separate evaluation type for
mapPartitionsInPandas
URL: https://github.com/apache/spark/pull/25044#discussion_r299985904
##########
File path: python/pyspark/worker.py
##########
@@ -295,7 +295,8 @@ def read_udfs(pickleSer, infile, eval_type):
is_map_iter = eval_type == PythonEvalType.SQL_MAP_PANDAS_ITER_UDF
if is_scalar_iter or is_map_iter:
- assert num_udfs == 1, "One SCALAR_ITER UDF expected here."
+ assert is_scalar_iter and num_udfs == 1, "One SCALAR_ITER UDF expected
here."
+ assert is_map_iter and num_udfs == 1, "One MAP_ITER UDF expected here."
Review comment:
Can the two `assert` both be passed? E.g., if `is_scalar_iter`, then another
`assert` will fail?
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