Merge pull request statsd#55 from leonmax/patch-1

minor issue in python client.

python_example.py

@@ -72,7 +72,7 @@ def send(data, sample_rate=1):
             import random
             if random.random() <= sample_rate:
                 for stat in data.keys():
-                    value = data[stat]
+                    value = sampled_data[stat]
                     sampled_data[stat] = "%s|@%s" %(value, sample_rate)
         else:
             sampled_data=data