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gh-101773: Optimize creation of Fractions in private methods #101780

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Merged
mdickinson merged 13 commits into from
Feb 27, 2023
Merged

gh-101773: Optimize creation of Fractions in private methods #101780

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9cc62f7
gh-101773: Optimize creation of Fraction's in private methods
skirpichev Feb 10, 2023
836d3a6
Merge branch 'main' into opt-fractions-new
skirpichev Feb 10, 2023
3625d34
Adjust signature of _from_pair() and add docstring
skirpichev Feb 11, 2023
9e66b5a
Use new helper in from_float/Decimal
skirpichev Feb 11, 2023
4324391
Restore back _normalize kwarg for the Fraction.__new__()
skirpichev Feb 11, 2023
b0dca38
Amend 3625d34155
skirpichev Feb 11, 2023
3a8506d
Nitpick on docstring (int's -> ints)
skirpichev Feb 27, 2023
13262af
Revert "Restore back _normalize kwarg for the Fraction.__new__()"
skirpichev Feb 27, 2023
4e8977a
Rename: _from_pair -> _from_coprime_ints
skirpichev Feb 27, 2023
57ac373
Merge branch 'main' into opt-fractions-new
skirpichev Feb 27, 2023
4b4a386
Update Misc/NEWS.d/next/Library/2023-02-10-11-59-13.gh-issue-101773.J…
skirpichev Feb 27, 2023
580b1be
+1
skirpichev Feb 27, 2023
53d5e94
Tweak docstring wording
mdickinson Feb 27, 2023
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Restore back _normalize kwarg for the Fraction.__new__()
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@skirpichev
skirpichev committed Feb 11, 2023
commit 43243910dc37b3dbdcf2bfe776eb0689028565be
13 changes: 7 additions & 6 deletions Lib/fractions.py
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Original file line number Diff line number Diff line change
Expand Up @@ -183,7 +183,7 @@ class Fraction(numbers.Rational):
__slots__ = ('_numerator', '_denominator')

# We're immutable, so use __new__ not __init__
def __new__(cls, numerator=0, denominator=None):
def __new__(cls, numerator=0, denominator=None, *, _normalize=True):
"""Constructs a Rational.

Takes a string like '3/2' or '1.5', another Rational instance, a
Expand Down Expand Up @@ -279,11 +279,12 @@ def __new__(cls, numerator=0, denominator=None):

if denominator == 0:
raise ZeroDivisionError('Fraction(%s, 0)' % numerator)
g = math.gcd(numerator, denominator)
if denominator < 0:
g = -g
numerator //= g
denominator //= g
if _normalize:
g = math.gcd(numerator, denominator)
if denominator < 0:
g = -g
numerator //= g
denominator //= g
self._numerator = numerator
self._denominator = denominator
return self
Expand Down