dongjoon-hyun commented on code in PR #48781:
URL: https://github.com/apache/spark/pull/48781#discussion_r1831785988
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python/pyspark/core/context.py:
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@@ -554,6 +554,28 @@ def setSystemProperty(cls, key: str, value: str) -> None:
assert SparkContext._jvm is not None
SparkContext._jvm.java.lang.System.setProperty(key, value)
+ @classmethod
+ def getSystemProperty(cls, key: str) -> str:
+ """
+ Get a Java system property, such as `java.home`.
+
+ .. versionadded:: 4.0.0
+
+ Parameters
+ ----------
+ key : str
+ The key of a new Java system property.
+
+ Examples
+ --------
+ >>> sc.getSystemProperty("SPARK_SUBMIT")
+ 'true'
+ >>> _ = sc.getSystemProperty("java.home")
+ """
+ SparkContext._ensure_initialized()
+ assert SparkContext._jvm is not None
+ return SparkContext._jvm.java.lang.System.getProperty(key)
Review Comment:
To @zhengruifeng , as I wrote in the PR description, this is a symmetric
version of the existing `setSystemProperty`. So, no for (1) and (3). For (2),
Scala can access `System.getProperty` directly already.
>
https://spark.apache.org/docs/4.0.0-preview2/api/python/reference/api/pyspark.SparkContext.setSystemProperty.html
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