special comparison for decimal/floats in py<2.7. fixes #254

1 files changed, 21 insertions, 0 deletions

diff --git a/rdflib/compat.py b/rdflib/compat.py
index b0616395..6c714894 100644
--- a/rdflib/compat.py
+++ b/rdflib/compat.py
@@ -2,3 +2,24 @@
 # code to simplify supporting older python versions
 #
 
+
+import sys
+
+from decimal import Decimal
+
+if sys.version_info[:2] < (2, 7):
+
+    # Pre-2.7 decimal and float did not compare correctly
+
+    def numeric_greater(a, b):
+        if isinstance(a, Decimal) and isinstance(b, float):
+            return float(a) > b
+        elif isinstance(a, float) and isinstance(b, Decimal):
+            return a > float(b)
+        else:
+            return a > b
+
+else:
+
+    def numeric_greater(a, b):
+        return a > b