[GitHub] [spark] holdenk commented on a change in pull request #23954: [SPARK-27041][PySpark] Use imap() for python 2.x to resolve oom issue

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holdenk commented on a change in pull request #23954: [SPARK-27041][PySpark] Use imap() for python 2.x to resolve oom issue
URL: https://github.com/apache/spark/pull/23954#discussion_r263981613
 
 

 ##########
 File path: python/pyspark/worker.py
 ##########
 @@ -45,6 +45,8 @@
 
 if sys.version >= '3':
     basestring = str
+else:
+    from itertools import imap as map  # use iterator map by default
 
 Review comment:
   The way we pickle UDFs is a little weird, so I wouldn't be too surprised if we did end up doing something silly by accident here, in that case we can also invert the imports (e.g. import map as imap in py3)

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