I want to take the reciprocal of Fraction in python, and do so in-place. The Fraction class does not provide a method for doing so (in my knowledge). I tried to just swap numerator and denominator:
f = Fraction(2, 3)
f.numerator, f.denominator = f.denominator, f.numerator
but it resulted in an AttributeError: can't set attribute.
I've also used the method of just constructing an new Fraction:
f = Fraction(2, 3)
f = Fraction(f.denominator, f.numerator)
which does in fact work, but creating a new object and deleting the old one doesn't seem very 'pythonic', i.e. unnecessarily complex. Is there a better way to take the reciprocal?
from fractions import Fraction
spam = Fraction(2, 3)
eggs = spam ** -1
print(repr(eggs))
output
Fraction(3, 2)
EDIT:
As suggested in comments by @martineau 1 / spam also works:
from fractions import Fraction
spam = Fraction(2, 3)
eggs = 1 / spam
print(repr(eggs))