Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/20288#discussion_r161965278
--- Diff: python/pyspark/sql/context.py ---
@@ -624,6 +536,9 @@ def _test():
globs['os'] = os
globs['sc'] = sc
globs['sqlContext'] = SQLContext(sc)
+ # 'spark' alias is a small hack for reusing doctests. Please see the
reassignment
+ # of docstrings above.
+ globs['spark'] = globs['sqlContext']
--- End diff --
shall we do `globs['spark'] = globs['sqlContext'].sparkSession`?
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