HyukjinKwon commented on code in PR #41396:
URL: https://github.com/apache/spark/pull/41396#discussion_r1211177500
##########
python/pyspark/sql/dataframe.py:
##########
@@ -4868,6 +4868,22 @@ def freqItems(
self._jdf.stat().freqItems(_to_seq(self._sc, cols), support),
self.sparkSession
)
+ def _ipython_key_completions_(self) -> List[str]:
+ """Returns the names of columns in this :class:`DataFrame`.
+
+ Examples
+ --------
+ >>> df = spark.createDataFrame([(2, "Alice"), (5, "Bob")], ["age",
"name"])
+ >>> df._ipython_key_completions_()
+ ['age', 'name']
+
+ Would return illegal identifiers.
+ >>> df = spark.createDataFrame([(2, "Alice"), (5, "Bob")], ["age 1",
"name?1"])
+ >>> df._ipython_key_completions_()
+ ['age 1', 'name?1']
+ """
+ return self.columns
Review Comment:
shouldn't it call `__dir__`?
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