fix examples

examples/src/main/python/streaming/network_wordcount.py

@@ -1,14 +1,14 @@
 import sys
 
-from pyspark.streaming.context import StreamingContext
-from pyspark.streaming.duration import *
+from pyspark import SparkContext
+from pyspark.streaming import StreamingContext
 
 if __name__ == "__main__":
     if len(sys.argv) != 3:
         print >> sys.stderr, "Usage: wordcount <hostname> <port>"
         exit(-1)
-    ssc = StreamingContext(appName="PythonStreamingNetworkWordCount",
-                           duration=Seconds(1))
+    sc = SparkContext(appName="PythonStreamingNetworkWordCount")
+    ssc = StreamingContext(sc, 1)
 
     lines = ssc.socketTextStream(sys.argv[1], int(sys.argv[2]))
     counts = lines.flatMap(lambda line: line.split(" "))\

examples/src/main/python/streaming/wordcount.py

@@ -1,15 +1,15 @@
 import sys
 
-from pyspark.streaming.context import StreamingContext
-from pyspark.streaming.duration import *
+from pyspark import SparkContext
+from pyspark.streaming import StreamingContext
 
 if __name__ == "__main__":
     if len(sys.argv) != 2:
         print >> sys.stderr, "Usage: wordcount <directory>"
         exit(-1)
 
-    ssc = StreamingContext(appName="PythonStreamingWordCount",
-                           duration=Seconds(1))
+    sc = SparkContext(appName="PythonStreamingWordCount")
+    ssc = StreamingContext(sc, 1)
 
     lines = ssc.textFileStream(sys.argv[1])
     counts = lines.flatMap(lambda line: line.split(" "))\

python/pyspark/streaming/__init__.py

@@ -0,0 +1,19 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+from pyspark.streaming.context import StreamingContext
+from pyspark.streaming.dstream import DStream

python/pyspark/streaming/context.py

@@ -22,6 +22,8 @@
 
 from py4j.java_collections import ListConverter
 
+__all__ = ["StreamingContext"]
+
 
 class StreamingContext(object):
     """