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[3.10] gh-92417: `fractions`, `decimal`: Improve docs for alternative constructor methods (GH-92421) by miss-islington · Pull Request #92971 · python/cpython · GitHub

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[3.10] gh-92417: fractions, decimal: Improve docs for alternative constructor methods (GH-92421) #92971

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ambv merged 1 commit into from
May 19, 2022
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[3.10] gh-92417: fractions, decimal: Improve docs for alternative constructor methods (GH-92421) #92971

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5 changes: 3 additions & 2 deletions Doc/library/decimal.rst
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Expand Up @@ -571,9 +571,10 @@ Decimal objects
>>> Decimal(321).exp()
Decimal('2.561702493119680037517373933E+139')

.. method:: from_float(f)
.. classmethod:: from_float(f)

Classmethod that converts a float to a decimal number, exactly.
Alternative constructor that only accepts instances of :class:`float` or
:class:`int`.

Note `Decimal.from_float(0.1)` is not the same as `Decimal('0.1')`.
Since 0.1 is not exactly representable in binary floating point, the
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12 changes: 6 additions & 6 deletions Doc/library/fractions.rst
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Expand Up @@ -105,10 +105,10 @@ another rational number, or from a string.

.. versionadded:: 3.8

.. method:: from_float(flt)
.. classmethod:: from_float(flt)

This class method constructs a :class:`Fraction` representing the exact
value of *flt*, which must be a :class:`float`. Beware that
Alternative constructor which only accepts instances of
:class:`float` or :class:`numbers.Integral`. Beware that
``Fraction.from_float(0.3)`` is not the same value as ``Fraction(3, 10)``.

.. note::
Expand All @@ -117,10 +117,10 @@ another rational number, or from a string.
:class:`Fraction` instance directly from a :class:`float`.


.. method:: from_decimal(dec)
.. classmethod:: from_decimal(dec)

This class method constructs a :class:`Fraction` representing the exact
value of *dec*, which must be a :class:`decimal.Decimal` instance.
Alternative constructor which only accepts instances of
:class:`decimal.Decimal` or :class:`numbers.Integral`.

.. note::

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