Stopgap for post- #646 and r3030, wedge in 0.3 Decimals-are-floats behavior for vanilla 2.3 Python.

1 files changed, 16 insertions, 0 deletions

diff --git a/lib/sqlalchemy/util.py b/lib/sqlalchemy/util.py
index 6cb65e395..7391d86fd 100644
--- a/lib/sqlalchemy/util.py
+++ b/lib/sqlalchemy/util.py
@@ -32,6 +32,22 @@ except:
             i -= 1
         raise StopIteration()
 
+try:
+    # Try the standard decimal for > 2.3 or the compatibility module
+    # for 2.3, if installed.
+    from decimal import Decimal
+    decimal_type = Decimal
+except ImportError:
+    def Decimal(arg):
+        if Decimal.warn:
+            warnings.warn(RuntimeWarning(
+                "True Decimal types not available on this Python, "
+                "falling back to floats."))
+            Decimal.warn = False
+        return float(arg)
+    Decimal.warn = True
+    decimal_type = float
+
 if sys.version_info >= (2, 5):
     class PopulateDict(dict):
         """a dict which populates missing values via a creation function.