Get rid of a bunch more raw_input references
diff --git a/Demo/pdist/sumtree.py b/Demo/pdist/sumtree.py
index 9291a56..68224df 100755
--- a/Demo/pdist/sumtree.py
+++ b/Demo/pdist/sumtree.py
@@ -1,4 +1,5 @@
 import time
+import sys
 import FSProxy
 
 def main():
@@ -9,7 +10,9 @@
     proxy._close()
     t2 = time.time()
     print t2-t1, "seconds"
-    raw_input("[Return to exit] ")
+    sys.stdout.write("[Return to exit] ")
+    sys.stdout.flush()
+    sys.stdin.readline()
 
 def sumtree(proxy):
     print "PWD =", proxy.pwd()