xinrong-databricks commented on a change in pull request #33929:
URL: https://github.com/apache/spark/pull/33929#discussion_r704654955
##########
File path: python/pyspark/pandas/tests/test_dataframe.py
##########
@@ -1287,8 +1278,42 @@ def test_drop(self):
pdf = pd.DataFrame({10: [1, 2], 20: [3, 4], 30: [5, 6]},
index=np.random.rand(2))
psdf = ps.from_pandas(pdf)
- self.assert_eq(psdf.drop(10), pdf.drop(10, axis=1))
- self.assert_eq(psdf.drop([20, 30]), pdf.drop([20, 30], axis=1))
+ self.assert_eq(psdf.drop(10, axis=1), pdf.drop(10, axis=1))
+ self.assert_eq(psdf.drop([20, 30], axis=1), pdf.drop([20, 30], axis=1))
+
+ #
+ # Drop rows by index
+ #
+
+ pdf = pd.DataFrame({"X": [1, 2, 3], "Y": [4, 5, 6], "Z": [7, 8, 9]},
index=["A", "B", "C"])
+ psdf = ps.from_pandas(pdf)
+
+ # Given labels (and axis = 0)
+ self.assert_eq(psdf.drop(labels="A", axis=0), pdf.drop(labels="A",
axis=0))
+ self.assert_eq(psdf.drop(labels="A"), pdf.drop(labels="A"))
+ self.assert_eq(psdf.drop(labels=["A", "C"], axis=0),
pdf.drop(labels=["A", "C"], axis=0))
+ self.assert_eq(
+ psdf.drop(labels=["A", "B", "C"], axis=0), pdf.drop(labels=["A",
"B", "C"], axis=0)
+ )
+
+ # Given index
+ self.assert_eq(psdf.drop(index="A"), pdf.drop(index="A"))
+ self.assert_eq(psdf.drop(index=["A", "C"]), pdf.drop(index=["A", "C"]))
+ self.assert_eq(psdf.drop(index=["A", "B", "C"]), pdf.drop(index=["A",
"B", "C"]))
+
+ # Non-string names
+ pdf.index = [10, 20, 30]
+ psdf = ps.from_pandas(pdf)
+ self.assert_eq(psdf.drop(labels=10, axis=0), pdf.drop(labels=10,
axis=0))
+ self.assert_eq(psdf.drop(labels=[10, 30], axis=0),
pdf.drop(labels=[10, 30], axis=0))
+ self.assert_eq(
+ psdf.drop(labels=[10, 20, 30], axis=0), pdf.drop(labels=[10, 20,
30], axis=0)
+ )
+
+ # MultiIndex
+ pdf.index = pd.MultiIndex.from_tuples([("a", "x"), ("b", "y"), ("c",
"z")])
+ psdf = ps.from_pandas(pdf)
+ self.assertRaises(NotImplementedError, lambda: psdf.drop(labels=[("a",
"x")]))
Review comment:
Good point! Let me support that in this PR.
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