Attempting to fix PySpark tests

Author: pwendell

python/pyspark/sql/dataframe.py

@@ -237,7 +237,8 @@ def explain(self, extended=False):
         :param extended: boolean, default ``False``. If ``False``, prints only the physical plan.
 
         >>> df.explain()
-        PhysicalRDD [age#0,name#1], MapPartitionsRDD[...] at mapPartitions at SQLContext.scala:...
+        PhysicalRDD [age#0,name#1], MapPartitionsRDD[...] at applySchemaToPythonRDD at\
+          NativeMethodAccessorImpl.java:...
 
         >>> df.explain(True)
         == Parsed Logical Plan ==