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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