Github user HyukjinKwon commented on a diff in the pull request:
https://github.com/apache/spark/pull/17469#discussion_r110800502
--- Diff: python/pyspark/sql/column.py ---
@@ -303,8 +342,27 @@ def isin(self, *cols):
desc = _unary_op("desc", "Returns a sort expression based on the"
" descending order of the given column name.")
- isNull = _unary_op("isNull", "True if the current expression is null.")
- isNotNull = _unary_op("isNotNull", "True if the current expression is
not null.")
+ _isNull_doc = """
+ True if the current expression is null. Often combined with
+ :func:`DataFrame.filter` to select rows with null values.
+
+ >>> df2.collect()
--- End diff --
Also, It seems somehow it can't fine `df2` here in the doctest just as the
error message says.
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at infrastruct...@apache.org or file a JIRA ticket
with INFRA.
---
---------------------------------------------------------------------
To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org
For additional commands, e-mail: reviews-h...@spark.apache.org
