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fractions: improve and simplify exponentiation #16704

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fractions: improve and simplify exponentiation #16704

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10 changes: 8 additions & 2 deletions stdlib/@tests/test_cases/builtins/check_pow.py
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Original file line number Diff line number Diff line change
Expand Up @@ -51,10 +51,16 @@
assert_type(Fraction() ** 4, Fraction)

assert_type(pow(Fraction(3, 7), complex(1, 8)), complex)
assert_type(Fraction(3, 7) ** complex(1, 8), complex)
assert_type(Fraction(3, 7) ** complex(1, 8), Fraction | float | complex)

assert_type(Fraction(-2).__pow__(0.5), Fraction | float | complex)
assert_type(Fraction(-2).__rpow__(0.5), Fraction | float | complex)

assert_type(Fraction(2).__pow__(Fraction(4)), Fraction | float | complex)
assert_type(Fraction(2).__rpow__(Fraction(4)), Fraction | float | complex)

assert_type(pow(complex(4, -8), Fraction(2, 3)), complex)
assert_type(complex(4, -8) ** Fraction(2, 3), complex)
assert_type(complex(4, -8) ** Fraction(2, 3), Fraction | float | complex)

assert_type(pow(Decimal("1.0"), Decimal("1.6")), Decimal)
assert_type(Decimal("1.0") ** Decimal("1.6"), Decimal)
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18 changes: 4 additions & 14 deletions stdlib/fractions.pyi
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Expand Up @@ -128,27 +128,17 @@ class Fraction(Rational):
@overload
def __pow__(a, b: int, modulo: None = None) -> Fraction: ...
@overload
def __pow__(a, b: float | Fraction, modulo: None = None) -> float: ...
@overload
def __pow__(a, b: complex, modulo: None = None) -> complex: ...
def __pow__(a, b: complex | Fraction, modulo: None = None) -> Fraction | float | complex: ...
else:
@overload
def __pow__(a, b: int) -> Fraction: ...
@overload
def __pow__(a, b: float | Fraction) -> float: ...
@overload
def __pow__(a, b: complex) -> complex: ...
def __pow__(a, b: complex | Fraction) -> Fraction | float | complex: ...

if sys.version_info >= (3, 14):
@overload
def __rpow__(b, a: float | Fraction, modulo: None = None) -> float: ...
@overload
def __rpow__(b, a: complex, modulo: None = None) -> complex: ...
def __rpow__(b, a: complex | Fraction, modulo: None = None) -> Fraction | float | complex: ...
else:
@overload
def __rpow__(b, a: float | Fraction) -> float: ...
@overload
def __rpow__(b, a: complex) -> complex: ...
def __rpow__(b, a: complex | Fraction) -> Fraction | float | complex: ...

def __pos__(a) -> Fraction: ...
def __neg__(a) -> Fraction: ...
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