Merged revisions 68813,69546 via svnmerge from

svn+ssh://pythondev@svn.python.org/python/trunk

........
  r68813 | raymond.hettinger | 2009-01-20 20:34:19 +0000 (Tue, 20 Jan 2009) | 3 lines

  Issue 4998:  __slots__ on Fractions was useless.
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  r69546 | mark.dickinson | 2009-02-12 17:55:42 +0000 (Thu, 12 Feb 2009) | 2 lines

  Typo fix.
........

Lib/numbers.py

@@ -17,6 +17,7 @@ class Number(object):
     caring what kind, use isinstance(x, Number).
     """
     __metaclass__ = ABCMeta
+    __slots__ = ()
 
     # Concrete numeric types must provide their own hash implementation
     __hash__ = None
@@ -41,6 +42,8 @@ class Complex(Number):
     type as described below.
     """
 
+    __slots__ = ()
+
     @abstractmethod
     def __complex__(self):
         """Return a builtin complex instance. Called for complex(self)."""
@@ -172,6 +175,8 @@ class Real(Complex):
     Real also provides defaults for the derived operations.
     """
 
+    __slots__ = ()
+
     @abstractmethod
     def __float__(self):
         """Any Real can be converted to a native float object.
@@ -265,6 +270,8 @@ Real.register(float)
 class Rational(Real):
     """.numerator and .denominator should be in lowest terms."""
 
+    __slots__ = ()
+
     @abstractproperty
     def numerator(self):
         raise NotImplementedError
@@ -288,6 +295,8 @@ class Rational(Real):
 class Integral(Rational):
     """Integral adds a conversion to long and the bit-string operations."""
 
+    __slots__ = ()
+
     @abstractmethod
     def __long__(self):
         """long(self)"""