Use highest protocol when pickling internal property maps

This fixes ticket:73

Use highest protocol when pickling internal property maps
This fixes ticket:73
505e795f · Tiago Peixoto · 510c25b4 · 505e795f
Commit 505e795f authored Sep 22, 2011 by Tiago Peixoto
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src/graph_tool/io.py src/graph_tool/io.py +1 -1

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--- a/src/graph_tool/io.py
+++ b/src/graph_tool/io.py
@@ -59,7 +59,7 @@ libgraph_tool_core.OStream.write = OStream_write
 # define and set the pickler/unpickler functions
 def pickler(stream, obj):
    sstream = StringIO()
-    pickle.dump(obj, sstream)
+    pickle.dump(obj, sstream, -1)
    stream.write(base64.b64encode(sstream.getvalue()))