Github user BryanCutler commented on a diff in the pull request:
https://github.com/apache/spark/pull/18732#discussion_r142521111
--- Diff: python/pyspark/worker.py ---
@@ -32,8 +32,9 @@
from pyspark.serializers import write_with_length, write_int, read_long, \
write_long, read_int, SpecialLengths, PythonEvalType,
UTF8Deserializer, PickleSerializer, \
BatchedSerializer, ArrowStreamPandasSerializer
-from pyspark.sql.types import toArrowType
+from pyspark.sql.types import to_arrow_type
from pyspark import shuffle
+from pyspark.sql.types import StructType
--- End diff --
combine this with `to_arrow_type` import
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