itholic commented on code in PR #42788:
URL: https://github.com/apache/spark/pull/42788#discussion_r1321310948
##########
python/pyspark/pandas/frame.py:
##########
@@ -9029,6 +9047,14 @@ def cov(self, min_periods: Optional[int] = None, ddof:
int = 1) -> "DataFrame":
"""
if not isinstance(ddof, int):
raise TypeError("ddof must be integer")
+ if numeric_only is None:
Review Comment:
Yeah, IMHO we should always recommend to use the `numeric_only` parameter
explicitly to prevent future confusion, because the default value of the
`numeric_only` parameter is still different from Pandas even if the result is
the same.
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