Github user davies commented on a diff in the pull request:
https://github.com/apache/spark/pull/2659#discussion_r19813742
--- Diff: python/pyspark/serializers.py ---
@@ -452,20 +454,182 @@ def loads(self, obj):
raise ValueError("invalid sevialization type: %s" % _type)
-class CompressedSerializer(FramedSerializer):
+class SizeLimitedStream(object):
"""
- Compress the serialized data
+ Read at most `limit` bytes from underline stream
+
+ >>> from StringIO import StringIO
+ >>> io = StringIO()
+ >>> io.write("Hello world")
+ >>> io.seek(0)
+ >>> lio = SizeLimitedStream(io, 5)
+ >>> lio.read()
+ 'Hello'
--- End diff --
It's similar to file, read() will read all the content from the stream
until the end.
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