raise an exception on NaN and Infinity decimal values

disruptek · Oct 15, 2012 · b2f6758 · b2f6758
1 parent 04cf4d3
commit b2f6758
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/boto/dynamodb/types.py b/boto/dynamodb/types.py
@@ -52,7 +52,10 @@ def serialize_num(s):
        validation to ensure no loss of precision.
     """
     try:
-        return str(dynamodb_context.create_decimal(s))
+        n = str(dynamodb_context.create_decimal(s))
+        if filter(lambda x: x in n, ('Infinity', 'NaN')):
+            raise TypeError('Infinity and NaN not supported')
+        return n
     except Exception, e:
         msg = '{0} numeric for `{1}`\n{2}'.format(\
             e.__class__.__name__, s, e.message or '')