Register decimals as numbers.Number
diff --git a/Lib/decimal.py b/Lib/decimal.py
index 4f9be21..c46037e 100644
--- a/Lib/decimal.py
+++ b/Lib/decimal.py
@@ -136,6 +136,7 @@
import copy as _copy
import math as _math
+import numbers as _numbers
try:
from collections import namedtuple as _namedtuple
@@ -3695,6 +3696,12 @@
return self
+# Register Decimal as a kind of Number (an abstract base class).
+# However, do not register it as Real (because Decimals are not
+# interoperable with floats).
+_numbers.Number.register(Decimal)
+
+
##### Context class #######################################################