1 files changed, 7 insertions, 0 deletions
diff --git a/Lib/decimal.py b/Lib/decimal.py
index 87bd142..dfc7043 100644
--- a/Lib/decimal.py
+++ b/Lib/decimal.py
@@ -136,6 +136,7 @@ __all__ = [
 
 import copy as _copy
 import math as _math
+import numbers as _numbers
 
 try:
     from collections import namedtuple as _namedtuple
@@ -3608,6 +3609,12 @@ def _dec_from_triple(sign, coefficient, exponent, special=False):
 
     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 #######################################################