Revert "bpo-26680: Incorporate is_integer in all built-in and standard library numeric types (GH-6121)" (GH-22584)

This reverts commit 58a7da9e125422323f79c4ee95ac5549989d8162.

3 files changed, 17 insertions, 37 deletions

diff --git a/Doc/library/decimal.rst b/Doc/library/decimal.rst
index 7a64973..e194649 100644
--- a/Doc/library/decimal.rst
+++ b/Doc/library/decimal.rst
@@ -621,13 +621,6 @@ Decimal objects
       Return :const:`True` if the argument is either positive or negative
       infinity and :const:`False` otherwise.
 
-   .. method:: is_integer()
-
-      Return :const:`True` if the argument is a finite integral value and
-      :const:`False` otherwise.
-
-      .. versionadded:: 3.10
-
    .. method:: is_nan()
 
       Return :const:`True` if the argument is a (quiet or signaling) NaN and
@@ -1222,13 +1215,6 @@ In addition to the three supplied contexts, new contexts can be created with the
       Returns ``True`` if *x* is infinite; otherwise returns ``False``.
 
 
-   .. method:: is_integer(x)
-
-      Returns ``True`` if *x* is finite and integral; otherwise
-      returns ``False``.
-
-      .. versionadded:: 3.10
-
    .. method:: is_nan(x)
 
       Returns ``True`` if *x* is a qNaN or sNaN; otherwise returns ``False``.
diff --git a/Doc/library/numbers.rst b/Doc/library/numbers.rst
index 5d49f5e..1b59495 100644
--- a/Doc/library/numbers.rst
+++ b/Doc/library/numbers.rst
@@ -49,30 +49,19 @@ The numeric tower
    numbers.
 
    In short, those are: a conversion to :class:`float`, :func:`math.trunc`,
-   :func:`round`, :func:`math.floor`, :func:`math.ceil`, :func:`divmod`,
-   :func:`~Real.is_integer`, ``//``, ``%``, ``<``, ``<=``, ``>``, and ``>=``.
+   :func:`round`, :func:`math.floor`, :func:`math.ceil`, :func:`divmod`, ``//``,
+   ``%``, ``<``, ``<=``, ``>``, and ``>=``.
 
    Real also provides defaults for :func:`complex`, :attr:`~Complex.real`,
    :attr:`~Complex.imag`, and :meth:`~Complex.conjugate`.
 
-   .. method:: is_integer()
-
-      Returns :const:`True` if this number has a finite and integral value,
-      otherwise :const:`False`.  This is a default implementation which
-      relies on successful conversion to :class:`int`. It may be overridden
-      in subclasses (such as it is in :class:`float`) for better performance,
-      or to handle special values such as NaN which are not
-      convertible to :class:`int`.
-
-      .. versionadded:: 3.10
-
 
 .. class:: Rational
 
    Subtypes :class:`Real` and adds
    :attr:`~Rational.numerator` and :attr:`~Rational.denominator` properties, which
-   should be in lowest terms. With these, it provides defaults for
-   :func:`float` and :func:`~Real.is_integer`.
+   should be in lowest terms. With these, it provides a default for
+   :func:`float`.
 
    .. attribute:: numerator
 
@@ -86,10 +75,9 @@ The numeric tower
 .. class:: Integral
 
    Subtypes :class:`Rational` and adds a conversion to :class:`int`.  Provides
-   defaults for :func:`float`, :attr:`~Rational.numerator`,
-   :attr:`~Rational.denominator`, and :func:`~Real.is_integer`.  Adds abstract
-   methods for ``**`` and bit-string operations: ``<<``, ``>>``, ``&``, ``^``,
-   ``|``, ``~``.
+   defaults for :func:`float`, :attr:`~Rational.numerator`, and
+   :attr:`~Rational.denominator`.  Adds abstract methods for ``**`` and
+   bit-string operations: ``<<``, ``>>``, ``&``, ``^``, ``|``, ``~``.
 
 
 Notes for type implementors
diff --git a/Doc/library/stdtypes.rst b/Doc/library/stdtypes.rst
index 04dfea2..5c6acc6 100644
--- a/Doc/library/stdtypes.rst
+++ b/Doc/library/stdtypes.rst
@@ -310,10 +310,6 @@ the operations, see :ref:`operator-summary`):
 +---------------------+---------------------------------+---------+--------------------+
 | ``x ** y``          | *x* to the power *y*            | \(5)    |                    |
 +---------------------+---------------------------------+---------+--------------------+
-| ``x.is_integer()``  | ``True`` if *x* has a finite    |         | :func:`~numbers\   |
-|                     | and integral value, otherwise   |         | .Real.is_integer`  |
-|                     | ``False``.                      |         |                    |
-+---------------------+---------------------------------+---------+--------------------+
 
 .. index::
    triple: operations on; numeric; types
@@ -587,6 +583,16 @@ class`. float also has the following additional methods.
    :exc:`OverflowError` on infinities and a :exc:`ValueError` on
    NaNs.
 
+.. method:: float.is_integer()
+
+   Return ``True`` if the float instance is finite with integral
+   value, and ``False`` otherwise::
+
+      >>> (-2.0).is_integer()
+      True
+      >>> (3.2).is_integer()
+      False
+
 Two methods support conversion to
 and from hexadecimal strings.  Since Python's floats are stored
 internally as binary numbers, converting a float to or from a