HyukjinKwon commented on a change in pull request #34007:
URL: https://github.com/apache/spark/pull/34007#discussion_r709156586
##########
File path: python/pyspark/pandas/tests/test_dataframe.py
##########
@@ -4428,6 +4428,28 @@ def f2(_) -> ps.Series[int]:
pdf.apply(lambda x: len(x), axis=1).sort_index(),
)
+ def test_apply_with_type(self):
+ pdf = self.pdf
+ psdf = ps.from_pandas(pdf)
+
+ def identify1(x) -> ps.DataFrame[int, int]:
+ return x
+
+ # Type hints set the default column names, and we use default index for
+ # pandas API on Spark. Here we ignore both diff.
+ actual = psdf.apply(identify1, axis=1)
+ expected = pdf.apply(identify1, axis=1)
+ self.assert_eq(sorted(actual["c0"].to_numpy()),
sorted(expected["a"].to_numpy()))
+ self.assert_eq(sorted(actual["c1"].to_numpy()),
sorted(expected["b"].to_numpy()))
+
+ def identify2(x) -> ps.DataFrame[slice("a", int), slice("b", int)]: #
noqa: F405
Review comment:
I used slice because mypy fails. FYI, the new syntax doesn't fail w/
mypy.
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