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https://issues.apache.org/jira/browse/SPARK-41869?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-41869:
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Assignee: Apache Spark
> DataFrame dropDuplicates should throw error on non list argument
> ----------------------------------------------------------------
>
> Key: SPARK-41869
> URL: https://issues.apache.org/jira/browse/SPARK-41869
> Project: Spark
> Issue Type: Sub-task
> Components: Connect
> Affects Versions: 3.4.0
> Reporter: Sandeep Singh
> Assignee: Apache Spark
> Priority: Major
>
> {code:java}
> df = self.spark.createDataFrame([("Alice", 50), ("Alice", 60)], ["name",
> "age"])
> # shouldn't drop a non-null row
> self.assertEqual(df.dropDuplicates().count(), 2)
> self.assertEqual(df.dropDuplicates(["name"]).count(), 1)
> self.assertEqual(df.dropDuplicates(["name", "age"]).count(), 2)
> type_error_msg = "Parameter 'subset' must be a list of columns"
> with self.assertRaisesRegex(TypeError, type_error_msg):
> df.dropDuplicates("name"){code}
> {code:java}
> Traceback (most recent call last):
> File
> "/Users/s.singh/personal/spark-oss/python/pyspark/sql/tests/test_dataframe.py",
> line 128, in test_drop_duplicates
> with self.assertRaisesRegex(TypeError, type_error_msg):
> AssertionError: TypeError not raised{code}
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