Github user davies commented on a diff in the pull request:
https://github.com/apache/spark/pull/1051#discussion_r14848204
--- Diff: python/pyspark/conf.py ---
@@ -99,6 +99,12 @@ def set(self, key, value):
self._jconf.set(key, unicode(value))
return self
+ def setIfMissing(self, key, value):
+ """Set a configuration property, if not already set."""
+ if self.get(key) == None:
--- End diff --
```
if key not in self:
```
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